CN101764688A - Remote assistance method and remote assistance system - Google Patents

Abstract

The invention relates to a remote assistance method, which is applied to a remote assistance system. The remote assistance system comprises a server device, a help seeking end device and an assistance end device. The remote assistance method includes the following steps. First, in response to a help seeking event, the ticket information is encrypted according to the first key so as to provide the encrypted ticket information to the server device. And then, the encrypted ticket information provided by the help-seeking terminal device is decoded according to the second key so as to obtain the ticket information through decoding. And finally, providing the ticket information obtained by decoding to the assisting end device, so that the assisting end device can log in the help seeking end device and perform remote assisting operation.

Description

Remote assistance method and remote assistance system

technical field

The invention relates to a communication system, and in particular to a remote assistance system for realizing the remote assistance function.

Background technique

In today's era of rapid technological development, many communication technologies are widely used in many applications to facilitate people's daily life. In one application, the customer service department of an electronic product supplier provides product operation assistance services to remote users who cannot use the electronic products it supplies normally.

In the existing common technology, remote users of electronic products need to obtain operation instructions and assistance from the customer service department through communication links such as indoor telephones, mobile phones or the Internet. However, how to use the existing communication technology to design a more convenient and easy-to-operate remote assistance system is one of the directions that the industry is constantly working on.

Contents of the invention

The purpose of the present invention is to provide a method for remotely logging into other people's devices safely, so that a certain user can log in to other people's devices for problem solving or system repair. For the person being assisted, the present invention can achieve simple operation. For the act of being assisted by others, the present invention also considers various security, real-time and system implementation flexibility during communication. Therefore, the present invention provides a remote assistance method and a remote assistance system.

To achieve the above purpose, the present invention provides a remote assistance method and a remote assistance system as follows:

The present invention provides a remote assistance system, wherein a help-seeking device (that is, a device operated by a user terminal) responds to a help-seeking event to provide ticket information to the assisting device via a server device of the remote assistance system. In this way, the assistance terminal device can log in to the assistance terminal device according to the ticket information, so as to assist the assistance terminal device to troubleshoot operation problems.

According to the present invention, a remote assistance method is provided, which is applied to a remote assistance system. The remote assistance system includes a server device, a help-seeking device and an assisting device. The remote assistance method includes the following steps. Firstly, in response to the help request event, the ticket information is encrypted according to the first key (Key), so as to provide the first encrypted ticket information to the server device. Then, according to the second key, the first encrypted ticket information provided by the help-calling device is decoded to obtain the ticket information. Afterwards, the decoded ticket information is provided to the assisting device, so that the assisting device can log in to the assisting device and perform remote assistance operations.

According to the present invention, a remote assistance system is proposed, including a help-seeking terminal device, a server device, and an assistance terminal device. The help-seeking device has a first key, and in response to a help-seeking event, the help-calling device encrypts the ticket information according to the first key to provide first encrypted ticket information. The server device has a second key, and the server device decodes the first encrypted ticket information according to the second key, so as to obtain and provide the ticket information by decoding. The assistance terminal device receives the ticket information provided by the server device, so that the assistance terminal device can log in to the assistance terminal device and perform remote assistance operations.

According to the present invention, a remote assistance system is provided, which is used for communicating with an assistance terminal device. The remote assistance system includes a help request terminal device and a server device. The help-calling device has a first key, and the help-calling device encrypts the ticket information according to the first key in response to a help-calling event, so as to provide first encrypted ticket information. The server device has a second key, and the server device decodes the first encrypted ticket information according to the second key, so as to obtain and provide the ticket information to the assisting terminal device. Thus, the assisting device can log in to the assisting device and perform remote assistance operations.

Beneficial effects of the present invention: In common remote connection methods, some kind of secret (such as an account password) is pre-shared between two hosts, and an additional Channel (such as a mobile phone text message) is added to log in. The effect achieved by the method of the present invention is that, through the assistance of a server host, the third-party assistance terminal device and the logged-in target device can safely perform remote connection without any shared secret in advance, and solve the problem that the target device is located at a floating IP address. Issues with the backend of the firewall are not limited to the specific identity of the assisting device, and can be adjusted dynamically at any time. Technically, the server host of the present invention can transmit the data of the target device to the assisting device in a multi-channel manner to increase the security of data transmission, and increase the reliability of the system through Secret Sharing information encapsulation. Compared with the prior art, it has a significant progress.

Description of drawings

FIG. 1 is a block diagram of a remote assistance system according to an embodiment of the present invention.

FIG. 2 shows the operation sequence diagram of FIG. 1 .

FIG. 3 is another block diagram of a remote assistance system according to an embodiment of the present invention.

FIG. 4 shows the operation sequence diagram of FIG. 3 .

FIG. 5 is another block diagram of the remote assistance system according to an embodiment of the present invention.

FIG. 6 shows the operation sequence diagram of FIG. 5 .

FIG. 7 is another block diagram of the remote assistance system according to an embodiment of the present invention.

FIG. 8 shows the operation sequence diagram of FIG. 7 .

FIG. 9 is another block diagram of the remote assistance system according to an embodiment of the present invention.

FIG. 10 is another block diagram of the remote assistance system according to the embodiment of the present invention.

FIG. 11 shows the operation sequence diagram of FIG. 10 .

[Description of main component symbols]

1, 2, 3, 4, 5: remote assistance system

12, 22, 32, 42, 42', 52: help-side device

14, 24, 34, 44, 44', 54: server device

16, 26, 36, 46, 46', 56: Assist end device

C, Cm-Cm, C1', Cj', C1", Cj": communication channel

Detailed ways

In order to make the above-mentioned content of the present invention more obvious and understandable, a preferred embodiment is specially cited below, together with the accompanying drawings, and described in detail as follows:

Please refer to FIG. 1 and FIG. 2 , FIG. 1 is a block diagram of a remote assistance system according to an embodiment of the present invention, and FIG. 2 is an operation sequence diagram of FIG. 1 . The remote assistance system 1 includes a help request terminal device 12 , a server device 14 and an assistance terminal device 16 . For example, the help-seeking device 12 is a home appliance device connected to the network through a home gateway (Home Gateway). In this way, the help-calling device 12 has a remote operation function capable of performing corresponding operations in response to instructions provided via the network and the home gateway. In one example, the electronic home appliance device is, for example, a digital television device.

The helper device 12 has a key (Key) KeyN. In response to the help-seeking event Eh, the help-seeking device 12 encrypts the ticket information IT according to the key KeyN, so as to provide the encrypted ticket information IT_k and the help-seeking command Chp. For example, the ticket information IT_k includes user account information, password information and IP address information. The help-seeking event Eh is, for example, an event that the user activates the help-seeking control button on the control panel of the help-calling device 12 .

The server device 14 has a key KeyS. In response to the help command Chp, the server device 14 decodes the encrypted ticket information IT_k according to the key KeyS to obtain the ticket information IT by decoding.

In one example, the help-seeking device 12 further includes a device serial number SN, and provides the device serial number SN to the server device 14 in response to the help-seeking event. And the key KeyS of the help-seeking device 12 and the key KeyN of the server device 14 satisfy, for example:

KeyN=Hash(KeyS∥SN)

In this way, through a hash operation, the server device 14 can generate the key KeyN according to the key KeyS it has and the device serial number SN provided by the help-end device 12, and then decode the encrypted ticket information IT_k to generate the ticket information IT.

The server device 14 also provides the decoded ticket information IT to the assistance terminal device 16, so that the assistance terminal device 16 can log in to the assistance terminal device 12 according to the ticket information IT, and perform remote assistance operations.

In one example, the data transmission operation between the server device 14 and the assisting device 16 is protected by using, for example, an authentication code (Authentication Code) mechanism. In the verification code mechanism, the server device 14 dynamically generates the verification code Rn, and provides the verification code Rn to the assisting end device 16 via a specific communication channel C (that is, a single channel implementation).

For example, the communication channel C can be a network transmission channel and a Global System for Mobile Communication (GSM) communication channel. The verification code Rn can be transmitted through the communication protocol (such as e-mail, voicemail, telephone system voicemail or telephone system SMS, etc.) using the aforementioned communication channel for transmission.

The assistant device 16 receives the verification code Rn, and correspondingly returns a response message SRn to log in to the server device 14 when receiving the verification code Rn. For example, the assistant device 16 directly returns the received verification code Rn as the response message SRn to the server device 14 to log in to the server device 14 . After receiving the response message SRn, the server device 14 determines that the verification of the assisting end device 16 is successful. In this way, the assisting end device 16 can obtain the ticket information IT in the server device 14, and log in to the assisting end device 12 accordingly to assist it in the corresponding Use the action.

In this embodiment, although only the situation where the server device 14 and the assisting terminal device 16 transmit the verification code Rn, the response information SRn and the ticket information IT via a communication channel C is used as an example for illustration, however, the remote assistance of this embodiment System 1 is not limited to this. In another example, the server device 14 of this embodiment can also transmit the ticket information IT through multiple channels.

Please refer to FIG. 3 , which shows another block diagram of the remote assistance system according to an embodiment of the present invention. In this example, there are m communication channels C1, C2, . The server device 24 provides the verification codes Rn1-Rnm to the assistant device 26 via the m communication channels C1-Cm.

Please refer to FIG. 4 , which shows the operation sequence diagram of FIG. 3 . For example, the verification codes Rn1-Rnm have different data values c. In this example, the assisting terminal device 26 can be based on any subset (Subset) of the verification code Rn1-Rnm (for example, the verification code {Rn3}, {Rn1, Rn2}, or {Rn1, Rn3}...etc. ) correspondingly generates a response message SRn and sends it back to the server device 24, so as to complete the authentication operation between the server device 24 and the assistant device 26.

In this embodiment, only the case where the verification code mechanism is applied to protect the data transmission operation between the server device 14 and the assisting end device 16 is used as an example for illustration, however, the remote assistance system 1 of this embodiment is not limited to this, However, other forms of mechanisms can also be used to protect the data transmission operation between the server device 14 and the assisting device 16 .

Please refer to FIG. 5 and FIG. 6 , FIG. 5 shows another block diagram of the remote assistance system according to an embodiment of the present invention, and FIG. 6 shows the operation sequence diagram of FIG. 5 . In this example, the data transmission operation between the server device 34 and the assisting device 36 is protected through a secret sharing mechanism. The server device 34 encrypts the ticket information IT with a key SK to obtain the encrypted ticket information IT_SK. For example, the encrypted ticket information IT_SK includes the exclusive OR result of the account information and the key SK, the exclusive OR result of the password information and the key SK, IP information, time parameter information and password information, account information and The hash verification information of IP information.

The server device 34 also divides the key SK into j sub-keys SK_1, SK_2, ..., SK_j, and sets that the key SK, j can be calculated according to i sub-keys in the j sub-keys SK_1-SK_j is a natural number greater than 1, and i is a natural number less than j.

The server device 34 provides the sub-keys SK_1-SK_j and the encrypted ticket information IT_SK to the assistant device 36 via j communication channels C1 ′, C2 ′, . . . , Cj ′ respectively.

For example, the server device 34 decomposes the key SK according to Shamir's password sharing mechanism. The key SK has a value of 1234, j and i are equal to 6 and 3 respectively, and the server device 34 also dynamically sets the parameter a1 equal to 166 and the parameter a2 equal to 94. Under such conditions, the server device 34 obtains the polynomial, for example:

f(x)＝1234+a ₁ x+a ₂ x ² ＝1234+166x+94x ²

Separately with the condition:

x=1; x=2; x=3; x=4; x=5; x=6

Putting it into the aforementioned polynomial can get 6 sets of solution sets (x, f(x)):

(1, 1494), (2, 1942), (3, 2578), (4, 3402), (5, 4414) and (6, 5614).

The six solution sets obtained by decomposing are respectively provided to the assisting end device 36 as sub-keys SK_1-SK_6 through corresponding communication channels. Assuming that the assisting device 36 receives the sub-keys SK_2, SK_5 and SK_6, the assisting device 36 can obtain the key SK according to the second, fifth and sixth sub-keys through the following equation:

SK_2=(x ₀ , y ₀ )=(2, 1942); SK_4=(x ₁ , y ₁ )=(4, 3402); SK_5=(x ₂ , y ₂ )=(5, 5614);

${\mathrm{<span\; class="notranslate">\; l</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; \&times;</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 4</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; \&times;</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 5</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 6</span>}}{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 3</span>}\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 3</span>}}$

${\mathrm{<span\; class="notranslate">\; l</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}<span\; class="notranslate">\; \&times;</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; \&times;</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 5</span>}}{\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 3</span>}\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 5</span>}$

${\mathrm{<span\; class="notranslate">\; l</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}<span\; class="notranslate">\; \&times;</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; \&times;</span>\frac{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 4</span>}}{\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 3</span>}}{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 2</span>}\frac{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; 3</span>}}$

$\mathrm{<span\; class="notranslate">\; f</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; z</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}}{\overset{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; z</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; l</span>}}_{\mathrm{<span\; class="notranslate">\; z</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1942</span>}<span\; class="notranslate">\; \{</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 6</span>}}{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 3</span>}\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; \}</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 3402</span>}<span\; class="notranslate">\; \{</span><span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 3</span>}\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; \}</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 4414</span>}<span\; class="notranslate">\; \{</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 3</span>}}{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 2</span>}\frac{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; \}</span>$

$<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1234</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 166</span>}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 94</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; SK</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 166</span>}\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 94</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}$

In this way, the assistant device 36 can obtain the key SK according to the aforementioned operations, and decode the encrypted ticket information IT_SK to obtain the ticket information IT.

Although in this embodiment only the operation of a Shamir's Secret Sharing (Secret Sharing) mechanism is used as an example for illustration, however, the data transmission between the server device 34 and the host device 36 of this embodiment is not limited to the use of Shamir's 's secret sharing mechanism for protection, and the key SK, i, and j are not limited to the settings of the foregoing example, but can also be other values that conform to the corresponding secret sharing mechanism.

Although in this embodiment, the operation of verifying the identity of the assisting device 16 logging in to the assisting device 12 by providing the verification code Rn to the assisting device 16 by the help-seeking device 12 is taken as an example, however, the remote The assistance system 1 is not limited to this.

Please refer to FIG. 7 and FIG. 8 , FIG. 7 is another block diagram of the remote assistance system according to an embodiment of the present invention, and FIG. 8 is an operation sequence diagram of FIG. 7 . In another example, the server device 44 provides the verification code Rn″ to the helper device 42 , and provides the verification code Rn″ to the assistance device 46 via the helper device 42 . Afterwards, the assisting device 46 generates a return message SRn' to the server device 44 according to the verification code Rn" provided by the requesting device 42 to log in to the server device 44. In this way, the assisting device 46 can also obtain the ticket information IT from the server device 44. , to log in to the help-side device 32 .

In this embodiment, although only the situation of encrypting by the fixed keys KeyN and KeyS between the server device 14 and the help-side device 12 is used as an example for illustration, the encryption operation between the server device 14 and the help-side device 12 does not Not limited to this.

Please refer to FIG. 9 , which shows another block diagram of the remote assistance system according to an embodiment of the present invention. In another example, the verification code Rn" is generated by the helper device 42' and provided to the server device 44' and the assisting device 46'. Afterwards, the assisting device 46' provides the verification code Rn" to the server device 44, To obtain the ticket information IT, and log in to the help terminal device 44'.

Please refer to FIG. 10 and FIG. 11 , FIG. 10 is another block diagram of the remote assistance system according to an embodiment of the present invention, and FIG. 11 is an operation sequence diagram of FIG. 10 . In another example, after the server device 54 obtains the key KeyN according to the device serial number SN, the server device 54 also dynamically generates the dynamic key SK', and provides the mutually exclusive or result Sxr of the dynamic key SK' and the key KeyN. To the help-side device 52. In this way, the helper device 52 can obtain the dynamic key SK′ according to the mutual exclusion or the result Sxr, and encrypt the ticket information IT accordingly, and provide the encrypted ticket information IT_SK′ to the server device 54 . In one example, the server device 54 also provides the time parameter information and hash verification information of the time parameter and the dynamic key SK to the requesting end device 52 to verify the dynamic key SK.

Next, the server device 54 performs substantially the same operation as the server device 34 to provide the encrypted ticket information IT_SK' to the assistant device 56 via Shamir's password sharing mechanism. In this way, the assistance terminal device 56 can obtain and log in the assistance terminal device 52 according to the ticket information IT_SK′.

In this embodiment, although the communication transmission between the help-calling device 12 and the server device 14 is encrypted and protected by using a hash operation and a symmetric encryption mechanism as an example for illustration, the help-calling device in this embodiment The communication transmission between 12 and the server device 14 is not limited to this. In other examples, the transmission between the help-seeking device 12 and the server device 14 can also be encrypted and protected by means of a public key cryptosystem.

To sum up, although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Those who have common knowledge in the technical field of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims (32)

1. A remote assistance method applied to a remote assistance system, characterized in that: the remote assistance system includes a server device, a help-seeking terminal device and an assistance terminal device, and the remote assistance method includes: (a) receiving a first encrypted ticket information, the first encrypted ticket information is generated by encrypting a ticket information according to a first key in response to a help request event; (b) decrypting the first encrypted ticket information provided by the help-calling device according to a second key, so as to obtain the ticket information by decoding; and (c) providing the decoded ticket information to the assistance terminal device, so that the assistance terminal device can log in to the assistance terminal device and perform remote assistance operations. 2. The remote assistance method according to claim 1, characterized in that: step (a) further comprises: Device serial number information is received, and the device serial number information is generated by the help-calling end device. 3. The remote assistance method according to claim 2, characterized in that: step (b) comprises: (b1) performing a hash operation with the second key according to the device serial number information to obtain the first key; and (b2) Decipher the first encrypted ticket information according to the first key, so as to obtain the ticket information. 4. The remote assistance method according to claim 1, further comprising: (d) generating an authentication message; (e) sending the authentication information to the assisting device via a Single Channel, and the assisting device is used to return a response message according to the authentication information; and (f) Determine whether the response message is received to determine whether the assisting device is successfully authenticated, and if so, perform step (c). 5. The remote assistance method according to claim 1, further comprising: (d) generating an authentication message; (e) sending the authentication information to the assisting device via a multi-channel path, and the assisting device is used to return a response message according to the authentication information; and (f) Determine whether the response message is received to determine whether the assisting device is successfully authenticated, and if so, perform step (c). 6. The remote assistance method according to claim 1, further comprising: (d) generating an authentication message; (e) providing the authentication information to the assisting device through the requesting device, and the assisting device is used to return a response message according to the authentication information; and (f) Determine whether the response message is received to determine whether the assisting device is successfully authenticated, and if so, perform step (c). 7. The remote assistance method according to claim 1, characterized in that: step (c) further comprises: (c1) generating and encrypting the ticket information according to a third key to generate a second encrypted ticket information; (c2) Decompose the third key according to the secret sharing mechanism to obtain N pieces of decomposed key information, where N is a natural number greater than 1; and (c3) Sending the N split key information and the second encrypted ticket information to the assistant device through N communication channels. 8. The remote assistance method according to claim 7, wherein the assisting device obtains the third key by synthesizing at least M pieces of decomposition key information among the N pieces of decomposition key information, and obtains the third key according to the first The third key decrypts the second encrypted ticket information to obtain the ticket information, and M is a natural number smaller than N. 9. The remote assistance method according to claim 1, further comprising: (d) generating an authentication message; (e) providing the authentication information to the help-calling device; (f) providing the authentication information received by the help-calling device to the assisting device, and the assisting device provides a response message to the server device according to the authentication information; and (g) Determine whether the response message is received to determine whether the assisting device is successfully authenticated, and if so, perform step (c). 10. The remote assistance method according to claim 1, wherein the first key is a public key. 11. A remote assistance system, comprising: A help-seeking terminal device has a first key, and the help-seeking terminal device encrypts a ticket information according to the first key in response to a help-seeking event, so as to provide a first encrypted ticket information; A server device having a second key, the server device decodes the first encrypted ticket information according to the second key, to obtain and provide the ticket information by decoding; and An assistance terminal device receives the ticket information provided by the server device, and the assistance terminal device can log into the assistance terminal device and perform remote assistance operations. 12. The remote assistance system according to claim 10, wherein the help-seeking device also generates and provides a device serial number information to the server device. 13. The remote assistance system according to claim 12, wherein the server device performs a hash operation with the second key according to the device serial number information to obtain the first key, and the server device also calculates the first key according to The first key decodes the first encrypted ticket information to obtain the ticket information. 14. The remote assistance system according to claim 11, characterized in that: The server device also generates authentication information, and sends the authentication information to the assisting device through a single channel path (SingleChannel), and the assisting device is used to return a response message according to the authentication information; and The server device also judges whether the response message is received to determine whether the assisting device is successfully authenticated. When the server device receives the response message, the server device judges that the assisting device is authenticated successfully, and provides the ticket information to the Assist end device. 15. The remote assistance system according to claim 11, characterized in that: The server device generates authentication information, and sends the authentication information to the assisting device through a multi-channel path, and the assisting device is used to return a response message according to the authentication information; and The server device also judges whether the response message is received to determine whether the assisting device is successfully authenticated. When the server device receives the response message, the server device judges that the assisting device is authenticated successfully, and provides the ticket information to the Assist end device. 16. The remote assistance system according to claim 11, characterized in that: generating authentication information, and providing the authentication information to the assisting device through the help-calling device, and the assisting device is used to return a response message according to the authentication information; and The server device also judges whether the response message is received to determine whether the assisting device is successfully authenticated. When the server device receives the response message, the server device judges that the assisting device is authenticated successfully, and provides the ticket information to the Assist end device. 17. The remote assistance system as claimed in claim 16, wherein the authentication information is generated by the server device or the help-requesting terminal device. 18. The remote assistance system according to claim 11, wherein the server device generates and encrypts the ticket information according to a third key to generate a second encrypted ticket information; The server device also decomposes the third key according to the secret sharing mechanism to obtain N pieces of decomposed key information, where N is a natural number greater than 1; The server device also sends the N pieces of decomposition key information and the second encrypted ticket information to the assistant device through N communication channels. 19. The remote assistance system according to claim 18, wherein the assisting device obtains the third key by synthesizing at least M pieces of decomposition key information among the N pieces of decomposition key information, and obtains the third key according to the first The third key decrypts the second encrypted ticket information to obtain the ticket information, and M is a natural number smaller than N. 20. The remote assistance system according to claim 11, characterized in that: The server device also generates authentication information and provides the authentication information to the help-requesting device; The help-calling device provides the authentication information to the assisting device, and the assisting device provides a response message to the server device according to the authentication information; and The server device also judges whether the response message is received to determine whether the assisting device is successfully authenticated. When the server device receives the response message, the server device judges that the assisting device is authenticated successfully, and provides the ticket information to the Assist end device. 21. The remote assistance system as claimed in claim 11, wherein the first key is a public key. 22. A remote assistance system, characterized in that it is used to communicate with an assistance terminal device, and the remote assistance system includes: A help-calling terminal device having a first key, the help-calling terminal device encrypts a ticket information according to the first key in response to a help-calling event, so as to provide a first encrypted ticket information; and A server device has a second key, and the server device decodes the first encrypted ticket information according to the second key, so as to obtain and provide the ticket information to the assisting terminal device, thus, the The assisting device can log in to the assisting device and perform remote assistance operations. 23. The remote assistance system according to claim 22, wherein the help-seeking device further provides a device serial number information to the server device. 24. The remote assistance system according to claim 23, wherein the server device performs a hash operation with the second key according to the device serial number information to obtain the first key, and the server device also calculates the first key according to The first key decodes the first encrypted ticket information to obtain the ticket information. 25. The remote assistance system as claimed in claim 22, characterized in that: the server device also generates authentication information, and sends the authentication information to the assisting end device via a single channel path (Single Channel), and the assisting end device for returning a response message according to the authentication message; and The server device also judges whether the response message is received to determine whether the assisting device is successfully authenticated. When the server device receives the response message, the server device judges that the assisting device is authenticated successfully, and provides the ticket information to the Assist end device. 26. The remote assistance system according to claim 22, characterized in that: The server device also generates authentication information, and sends the authentication information to the assisting device through a multi-channel path, and the assisting device is used to return a response message according to the authentication information; and The server device also judges whether the response message is received to determine whether the assisting device is successfully authenticated. When the server device receives the response message, the server device judges that the assisting device is authenticated successfully, and provides the ticket information to the Assist end device. 27. The remote assistance system according to claim 22, characterized in that: generating authentication information, and providing the authentication information to the assisting device through the help-calling device, and the assisting device is used to return a response message according to the authentication information; and The server device also judges whether the response message is received to determine whether the assisting device is successfully authenticated. When the server device receives the response message, the server device judges that the assisting device is authenticated successfully, and provides the ticket information to the Assist end device. 28. The remote assistance system as claimed in claim 27, wherein the authentication information is generated by the server device or the help-requesting terminal device. 29. The remote assistance system according to claim 22, characterized in that: The server device generates and encrypts the ticket information according to a third key to generate a second encrypted ticket information; The server device also decomposes the third key according to the secret sharing mechanism to obtain N pieces of decomposed key information, where N is a natural number greater than 1; The server device also sends the N pieces of decomposition key information and the second encrypted ticket information to the assistant device through N communication channels. 30. The remote assistance system according to claim 29, wherein the assisting device obtains the third key by synthesizing at least M pieces of decomposition key information among the N pieces of decomposition key information, and obtains the third key according to the first The third key decrypts the second encrypted ticket information to obtain the ticket information, and M is a natural number smaller than N. 31. The remote assistance system according to claim 22, characterized in that: The server device also generates authentication information and provides the authentication information to the help-requesting device; The help-calling device provides the authentication information to the assisting device, and the assisting device provides a response message to the server device according to the authentication information; and The server device also judges whether the response message is received to determine whether the assisting device is successfully authenticated. When the server device receives the response message, the server device judges that the assisting device is authenticated successfully, and provides the ticket information to the Assist end device. 32. The remote assistance system as claimed in claim 22, wherein the first key is a public key.

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