CN102571352B - The method to set up of cryptographic key factors of dynamic tokens and device - Google Patents
The method to set up of cryptographic key factors of dynamic tokens and device Download PDFInfo
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Abstract
Present invention is disclosed a kind of method to set up and device of dynamic token key data, the method comprising the steps of: the second intelligent key apparatus receives the key data that the first intelligent key apparatus exports; Cryptographic key factor is generated according to key data.The method to set up of a kind of cryptographic key factors of dynamic tokens provided by the invention and device, without the need to arranging the opening of programming cryptographic key factor at shell, can accomplish the sealing of dynamic token.
Description
Technical field
The present invention relates to technical field of data security, particularly relate to a kind of method to set up and device of cryptographic key factors of dynamic tokens.
Background technology
Along with socioeconomic development; the demand that people carry out online transaction gets more and more; in order to protect the safety of online transaction account, people can select to buy dynamic token (disposal password device), replace traditional static password with the dynamic password that it produces.Dynamic token in the market, because need the mode communicated by contact when issuing, programming cryptographic key factor, so shell must leave opening, therefore can not water proof and dust proof.
Summary of the invention
Main purpose of the present invention, for providing a kind of method to set up and device of cryptographic key factors of dynamic tokens, arranges cryptographic key factor by the method, without the need to arranging the opening of programming cryptographic key factor at shell, can accomplish the sealing of dynamic token.
The method to set up of a kind of cryptographic key factors of dynamic tokens of the present invention, comprises step:
Second intelligent key apparatus receives the key data that the first intelligent key apparatus exports;
Cryptographic key factor is generated according to key data.
Preferably, described first intelligent key apparatus is dynamic token, and the second intelligent key apparatus is dynamic token distribution device; Or described first intelligent key apparatus is dynamic token distribution device, and the second intelligent key apparatus is dynamic token.
Preferably, described second intelligent key apparatus receives key data and is specially: the second intelligent key apparatus receives key data by the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change.
Preferably, described second intelligent key apparatus receives key data by the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change and comprises: the second intelligent key apparatus reads the displaying contents that the first intelligent key apparatus exports; Described displaying contents comprise through the first intelligent key apparatus by key data modulate generate brightness, brightness change, color and/or color change information;
When described displaying contents comprises the brightness of one or more the first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information, and displaying contents is not when comprising brightness and/or color reference information, demodulation is carried out to described brightness, brightness change, color and/or color change information, obtains key data;
When described displaying contents comprises the brightness of multiple first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information, and displaying contents is when comprising brightness and/or color reference information, rear demodulation is calibrated to described brightness, brightness change, color and/or color change information, obtains key data.
Preferably, when described displaying contents comprise the brightness of multiple first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information time, described displaying contents also comprises brightness, brightness change, color and/or color change synchronizing information signal, for providing reference synchronization for described brightness, brightness change, color and/or color change information.
Preferably, described second intelligent key apparatus reads described brightness, brightness change, color and/or color change information by photo resistance, photodiode or phototriode.
Preferably, described second intelligent key apparatus receive first intelligent key apparatus send key data be specially: the second intelligent key apparatus receives key data by infrared mode.
Present invention also offers a kind of setting device of cryptographic key factors of dynamic tokens, comprising:
Receiver module, for receiving the key data that the first intelligent key apparatus sends;
Generation module, for generating cryptographic key factor according to described key data.
Preferably, the setting device of described cryptographic key factors of dynamic tokens is dynamic token, and the first intelligent key apparatus is dynamic token distribution device; Or described first intelligent key apparatus is dynamic token, the setting device of described cryptographic key factors of dynamic tokens is dynamic token distribution device.
Preferably, described receiver module specifically for: receive key data by the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change.
Preferably, described receiver module comprises:
Reading unit, for reading the displaying contents that the first intelligent key apparatus exports; Described displaying contents comprise through the first intelligent key apparatus by key data modulate generate brightness, brightness change, color and/or color change information;
Demodulating unit, the brightness of one or more the first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information is comprised for working as described displaying contents, and displaying contents is not when comprising brightness and/or color reference information, demodulation is carried out to described brightness, brightness change, color and/or color change information, obtains key data; And when described displaying contents comprises the brightness of multiple first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information, and displaying contents is when comprising brightness and/or color reference information, rear demodulation is calibrated to described brightness, brightness change, color and/or color change information, obtains key data.
Preferably, when described displaying contents comprise the brightness of multiple first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information time, described displaying contents also comprises brightness, brightness change, color and/or color change synchronizing information signal, for providing reference synchronization for described brightness, brightness change, color and/or color change information.
Preferably, described reading unit reads described brightness, brightness change, color and/or color change information by photo resistance, photodiode or phototriode.
Preferably, described receiver module specifically for: receive key data by infrared mode.
The method to set up of a kind of cryptographic key factors of dynamic tokens of the present invention and device, by receiving the brewed brightness of key data, brightness change, color and/or color change information or infrared information that the first intelligent key apparatus exports, receive the key data that the first intelligent key apparatus exports, generate cryptographic key factor according to key data afterwards.Adopt the set-up mode of this cryptographic key factor, without the need to arranging the contact communication interface of programming cryptographic key factor on dynamic token, the Seal Design of dynamic token can be accomplished, realize water proof and dust proof.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of method to set up one embodiment of cryptographic key factors of dynamic tokens of the present invention;
Fig. 2 is the schematic flow sheet of mode one in method to set up one embodiment of cryptographic key factors of dynamic tokens of the present invention;
Fig. 3 is the structural representation of setting device one embodiment of cryptographic key factors of dynamic tokens of the present invention;
Fig. 4 is the structural representation of receiver module in setting device one way of example one of cryptographic key factors of dynamic tokens of the present invention;
Fig. 5 is the structural representation of reading unit in setting device one way of example one of cryptographic key factors of dynamic tokens of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In the embodiment of the present invention, dynamic token distribution device can be dynamic token server, or can carry out data interaction with dynamic token server and can generate the miscellaneous equipment of key data, as PC, mobile terminal etc.
With reference to Fig. 1, propose method to set up one embodiment of cryptographic key factors of dynamic tokens of the present invention, comprising:
Step S10, the second intelligent key apparatus receive the key data that the first intelligent key apparatus exports;
In the present embodiment, the second intelligent key apparatus can receive key data by following two modes:
Mode one, the second intelligent key apparatus receives key data by the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change, with reference to Fig. 2, comprises step:
Step S101, the second intelligent key apparatus read the displaying contents that the first intelligent key apparatus exports; Described displaying contents comprise through the first intelligent key apparatus by key data modulate generate brightness, brightness change, color and/or color change information;
First intelligent key apparatus needs carry out cryptographic key factor arrange time, can start with different brightness, brightness change, color and/or color change (information that the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change produce is referred to as brightness, brightness change, color and/or color change information by the present embodiment) Circulating fibrocytes key data, until the predetermined number of times of Circulating fibrocytes or stop display after the scheduled time.The displaying contents that now the first intelligent key apparatus exports includes but are not limited to the brightness of the first intelligent key apparatus screen, brightness changes, color and/or color change information, this brightness, brightness changes, color and/or color change information are modulated by key data and are obtained, the mode of modulation can be amplitude modulation(PAM) or phase-modulation etc., described key data can be the brightness generated with the display brightness of plaintext directly modulation first intelligent key apparatus screen, brightness changes, color and/or color change information, also the brightness that the display brightness can modulating the first intelligent key apparatus screen by the ciphertext after encryption generates, brightness changes, color and/or color change information, described encryption can be carry out according to the key prestored and cryptographic algorithm.Because the first intelligent key apparatus screen comprises multiple viewing area, the displaying contents of therefore the first intelligent key apparatus output can comprise the brightness of one or more viewing area, brightness change, color and/or color change information.In actual applications, by the second intelligent key apparatus is provided with photo resistance, the part of photodiode or phototriode aims at brightness on the first intelligent key apparatus screen, brightness changes, the region of color and/or color change information displaying, respond to the brightness of the first intelligent key apparatus screen, brightness changes, color and/or color change also read brightness, brightness changes, color and/or color change information, be appreciated that, described second intelligent key apparatus is provided with photo resistance, the shell of the part of photodiode or phototriode adopts printing opacity design.
Step S102, comprise the brightness of one or more the first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information when described displaying contents, and displaying contents is not when comprising brightness and/or color reference information, demodulation is carried out to described brightness, brightness change, color and/or color change information, obtains key data;
Step S103, comprise the brightness of multiple first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information when described displaying contents, and displaying contents is when comprising brightness and/or color reference information, rear demodulation is calibrated to described brightness, brightness change, color and/or color change information, obtains key data.
Described key data is for generating cryptographic key factor, and this cryptographic key factor then may be used for generating dynamic password, carries out authentication for user.The generation of this key data can be the fixing use of disposable generation; Also can be repeatedly generate, change and use.This key data can generate in a random basis.
The displaying contents exported due to the first intelligent key apparatus can comprise the brightness of one or more viewing area, brightness change, color and/or color change information.Therefore, the displaying contents exported when the first intelligent key apparatus comprises the brightness of one or more viewing area, brightness change, color and/or color change information, and displaying contents is not when comprising brightness and/or color reference information, directly demodulation is carried out to this brightness, brightness change, color and/or color change information, obtain corresponding key data.The displaying contents exported when the first intelligent key apparatus comprises the brightness of two or more viewing area, brightness changes, when color and/or color change information, the displaying contents then simultaneously exported can also comprise brightness and/or color reference information, by the brightness to the multiple viewing areas received of this brightness and/or color reference information, brightness changes, color and/or color change information carry out brightness and/or color adjustment, the brightness after calibrating can be obtained, brightness changes, color and/or color change information, again according to the brightness after calibration, brightness changes, color and/or color change demodulates information, obtain key data.Further, the displaying contents exported for the first intelligent key apparatus comprises the situation of the brightness of two or more viewing area, brightness change, color and/or color change information, first intelligent key apparatus also can simultaneously output brightness, brightness change, color and/or color change synchronizing information signal, for providing reference synchronization for described brightness, brightness change, color and/or color change information.
Mode two, the second intelligent key apparatus receives key data by infrared mode, and namely the second intelligent key apparatus directly receives key data by infrared transceiver etc.
Step S11, according to key data generate cryptographic key factor.
Second intelligent key apparatus directly can extract cryptographic key factor or calculate according to the content of key data and generate cryptographic key factor from the content of key data, and this cryptographic key factor may be used for generating dynamic password.
Be appreciated that the first intelligent key apparatus described in the present embodiment is dynamic token, the second intelligent key apparatus is dynamic token distribution device; Or described first intelligent key apparatus is dynamic token distribution device, and the second intelligent key apparatus is dynamic token.That is, described key data can be export to dynamic token distribution device after being generated by dynamic token, also can be to export to dynamic token after dynamic token distribution device generates.
The method to set up of the cryptographic key factors of dynamic tokens described in the present embodiment, by receiving the brewed brightness of key data, brightness change, color and/or color change information or infrared information that the first intelligent key apparatus exports, receive the key data that the first intelligent key apparatus exports, generate cryptographic key factor according to key data afterwards.Adopt the set-up mode of this cryptographic key factor, without the need to arranging the contact communication interface of programming cryptographic key factor on dynamic token, the Seal Design of dynamic token can be accomplished, realize water proof and dust proof.
With reference to Fig. 3, propose setting device one embodiment of cryptographic key factors of dynamic tokens of the present invention, comprising:
Receiver module 10, for receiving the key data that the first intelligent key apparatus sends;
Generation module 20, for generating cryptographic key factor according to described key data.
In the present embodiment, receiver module 10 receives key data by following two modes:
Mode one, receiver module 10 receives key data by the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change, with reference to Fig. 4, Figure 4 shows that the structure of mode once receiver module 10, comprising:
Reading unit 11, for reading the displaying contents that the first intelligent key apparatus exports; Described displaying contents comprise through the first intelligent key apparatus by key data modulate generate brightness, brightness change, color and/or color change information;
Demodulating unit 12, the brightness of one or more the first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information is comprised for working as described displaying contents, and displaying contents is not when comprising brightness and/or color reference information, demodulation is carried out to described brightness, brightness change, color and/or color change information, obtains key data; And when described displaying contents comprises the brightness of multiple first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information, and displaying contents is when comprising brightness and/or color reference information, rear demodulation is calibrated to described brightness, brightness change, color and/or color change information, obtains key data.
The setting device of the cryptographic key factors of dynamic tokens of the present embodiment can be dynamic token itself, also can be the device being internal or external at dynamic token, or dynamic token distribution device itself, also can be the device being internal or external at dynamic token distribution device.In practical design, reading unit 11 can by comprising photo resistance, the photosensitive unit of photodiode or phototriode realizes, and demodulating unit 12 can be realized by microprocessor.
First intelligent key apparatus is needing to start when carrying out authenticating user identification with different brightness, brightness change, color and/or color change (information that the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change produce is referred to as brightness, brightness change, color and/or color change information by the present embodiment) Circulating fibrocytes key data, until the predetermined number of times of Circulating fibrocytes or stop display after the scheduled time.Now the first intelligent key apparatus exports the displaying contents of local terminal screen, this displaying contents comprises but not only for the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change information, this brightness, brightness change, color and/or color change information are modulated by key data and are obtained, and the mode of modulation can be amplitude modulation(PAM) or enumerate phase-modulation etc.Described key data can be with the brightness of the display brightness of plaintext directly modulation first intelligent key apparatus screen generation, brightness change, color and/or color change information, also the brightness that the display brightness can modulating the first intelligent key apparatus screen by the ciphertext after encryption generates, brightness change, color and/or color change information, described encryption can be carry out according to the key prestored and cryptographic algorithm.Because the first intelligent key apparatus screen comprises multiple viewing area, the displaying contents of therefore the first intelligent key apparatus output can comprise the brightness of one or more viewing area, brightness change, color and/or color change information.
Reading unit 11 reads the displaying contents that the first intelligent key apparatus exports, and is sent to demodulating unit 12.Demodulating unit 12 pairs of brightness, brightness change, color and/or color change information carry out demodulation, obtain key data.Described key data is for generating cryptographic key factor, and this cryptographic key factor then may be used for generating dynamic password, carries out authentication for user.The generation of this key data can be the fixing use of disposable generation; Also can be repeatedly generate, change and use.This key data can generate in a random basis.
The displaying contents exported due to the first intelligent key apparatus can comprise the brightness of one or more viewing area, brightness change, color and/or color change information.Therefore, the displaying contents exported when the first intelligent key apparatus comprises the brightness of one or more viewing area, brightness change, color and/or color change information, and displaying contents is not when comprising brightness and/or color reference information, demodulating unit 12 directly carries out demodulation to this brightness, brightness change, color and/or color change information, obtains corresponding key data.The displaying contents exported when the first intelligent key apparatus comprises the brightness of two or more viewing area, brightness changes, when color and/or color change information, the displaying contents then simultaneously exported also comprises brightness and/or color reference information, demodulating unit 12 by this brightness and/or color reference information to the brightness of the multiple viewing areas received, brightness changes, color and/or color change information carry out brightness and/or color adjustment, the brightness after calibrating can be obtained, brightness changes, color and/or color change information, again according to the brightness after this calibration, brightness changes, color and/or color change information carry out demodulation, obtain key data.Further, the displaying contents exported for the first intelligent key apparatus comprises the situation of the brightness of two or more viewing area, brightness change, color and/or color change information, first intelligent key apparatus also can export synchronizing signal simultaneously, for the brightness of two or more viewing area, brightness change, color and/or color change information provide reference synchronization.
Mode two, receiver module 10 receives key data by infrared mode, and namely the second intelligent key apparatus directly receives key data by infrared transceiver etc.
Finally, generation module 20 is according to the key data obtained, and from the content of key data, directly extract cryptographic key factor or calculate generation cryptographic key factor according to the content of key data, this cryptographic key factor may be used for generating dynamic password.
With reference to Fig. 5, Fig. 5 further illustrate when the second intelligent key apparatus by photosensitive unit read brightness, brightness change, color and/or color change information time photosensitive unit circuit diagram, this photosensitive unit can comprise photo resistance, photodiode or phototriode, and the present embodiment is described for photo resistance.
As shown in the figure, this photosensitive unit comprise connect successively photo resistance 111, amplifying circuit 112 and A/D change-over circuit 113, after brightness, brightness change, color and/or color change information are read in photo resistance 111, this brightness, brightness change, color and/or color change information input amplifying circuit 112 are amplified, the signal that amplifying circuit 112 exports by A/D change-over circuit 113 carries out analog/digital conversion, afterwards by output digit signals to demodulating unit 12.
Above-mentioned photo resistance 111 can be substituted by photodiode or phototriode, but when using phototriode, can without amplifying circuit 112, the brightness of directly being read by phototriode, brightness change, color and/or color change information input A/D change-over circuit 113 carry out analog/digital conversion.
Second intelligent key apparatus is provided with photo resistance, the part of photodiode or phototriode aims at brightness on the first intelligent key apparatus screen, brightness change, color and/or color change information displaying region, the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change can be responded to and read brightness, brightness change, color and/or color change information, be appreciated that described second intelligent key apparatus is provided with photo resistance, the shell of part of photodiode or phototriode adopts printing opacity design.
Be appreciated that the first intelligent key apparatus described in the present embodiment is dynamic token, the setting device of cryptographic key factors of dynamic tokens is dynamic token distribution device; Or described first intelligent key apparatus is dynamic token distribution device, the setting device of cryptographic key factors of dynamic tokens is dynamic token.That is, described key data can be export to dynamic token distribution device after being generated by dynamic token, also can be to export to dynamic token after dynamic token distribution device generates.
In the present embodiment, the brewed brightness of key data, brightness change, color and/or color change information or infrared information that the setting device of cryptographic key factors of dynamic tokens is exported by reception first intelligent key apparatus, receive the key data that the first intelligent key apparatus exports, generate cryptographic key factor according to key data afterwards.Adopt the set-up mode of this cryptographic key factor, without the need to arranging the contact communication interface of programming cryptographic key factor on dynamic token, the Seal Design of dynamic token can be accomplished, realize water proof and dust proof.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a method to set up for cryptographic key factors of dynamic tokens, is characterized in that, comprises step:
Second intelligent key apparatus receives the key data that the first intelligent key apparatus exports;
Cryptographic key factor is generated according to key data;
Wherein, described second intelligent key apparatus reception key data is specially:
Second intelligent key apparatus receives key data by the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change, and the brightness of described first intelligent key apparatus screen, brightness change, color and/or color change information are modulated by key data and obtained;
Described first intelligent key apparatus is dynamic token, and the second intelligent key apparatus is dynamic token distribution device; Or described first intelligent key apparatus is dynamic token distribution device, and the second intelligent key apparatus is dynamic token.
2. the method for claim 1, is characterized in that, described second intelligent key apparatus receives key data by the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change and comprises:
Second intelligent key apparatus reads the displaying contents that the first intelligent key apparatus exports; Described displaying contents comprise through the first intelligent key apparatus by key data modulate generate brightness, brightness change, color and/or color change information;
When described displaying contents comprises the brightness of one or more the first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information, and displaying contents is not when comprising brightness and/or color reference information, demodulation is carried out to described brightness, brightness change, color and/or color change information, obtains key data;
When described displaying contents comprises the brightness of multiple first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information, and displaying contents is when comprising brightness and/or color reference information, rear demodulation is calibrated to described brightness, brightness change, color and/or color change information, obtains key data.
3. method as claimed in claim 2, it is characterized in that, when described displaying contents comprise the brightness of multiple first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information time, described displaying contents also comprises brightness, brightness change, color and/or color change synchronizing information signal, for providing reference synchronization for described brightness, brightness change, color and/or color change information.
4. method as claimed in claim 2 or claim 3, it is characterized in that, described second intelligent key apparatus reads described brightness, brightness change, color and/or color change information by photo resistance, photodiode or phototriode.
5. the method for claim 1, is characterized in that, the key data that described second intelligent key apparatus receives the first intelligent key apparatus transmission is specially:
Second intelligent key apparatus receives key data by infrared mode.
6. a setting device for cryptographic key factors of dynamic tokens, is characterized in that, comprising:
Receiver module, for receiving the key data that the first intelligent key apparatus sends;
Generation module, for generating cryptographic key factor according to described key data;
Wherein, described receiver module specifically for:
Receive key data by the brightness of the first intelligent key apparatus screen, brightness change, color and/or color change, the brightness of described first intelligent key apparatus screen, brightness change, color and/or color change information are modulated by key data and are obtained;
The setting device of described cryptographic key factors of dynamic tokens is dynamic token, and the first intelligent key apparatus is dynamic token distribution device; Or described first intelligent key apparatus is dynamic token, the setting device of described cryptographic key factors of dynamic tokens is dynamic token distribution device.
7. device as claimed in claim 6, it is characterized in that, described receiver module comprises:
Reading unit, for reading the displaying contents that the first intelligent key apparatus exports; Described displaying contents comprise through the first intelligent key apparatus by key data modulate generate brightness, brightness change, color and/or color change information;
Demodulating unit, the brightness of one or more the first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information is comprised for working as described displaying contents, and displaying contents is not when comprising brightness and/or color reference information, demodulation is carried out to described brightness, brightness change, color and/or color change information, obtains key data; And when described displaying contents comprises the brightness of multiple first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information, and displaying contents is when comprising brightness and/or color reference information, rear demodulation is calibrated to described brightness, brightness change, color and/or color change information, obtains key data.
8. device as claimed in claim 7, it is characterized in that, when described displaying contents comprise the brightness of multiple first intelligent key apparatus on-screen display (osd) area, brightness change, color and/or color change information time, described displaying contents also comprises brightness, brightness change, color and/or color change synchronizing information signal, for providing reference synchronization for described brightness, brightness change, color and/or color change information.
9. device as claimed in claim 7 or 8, it is characterized in that, described reading unit reads described brightness, brightness change, color and/or color change information by photo resistance, photodiode or phototriode.
10. device as claimed in claim 6, is characterized in that, described receiver module specifically for:
Key data is received by infrared mode.
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| CN201110456577.XA CN102571352B (en) | 2011-12-30 | 2011-12-30 | The method to set up of cryptographic key factors of dynamic tokens and device |
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| CN201110456577.XA CN102571352B (en) | 2011-12-30 | 2011-12-30 | The method to set up of cryptographic key factors of dynamic tokens and device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1838595A (en) * | 2005-03-25 | 2006-09-27 | 日本电气株式会社 | The authentication system and the authentication method which use a portable communication terminal |
| CN201191411Y (en) * | 2007-12-07 | 2009-02-04 | 邓康乐 | Credit card with safety device |
| CN101930511A (en) * | 2009-06-25 | 2010-12-29 | 鸿富锦精密工业（深圳）有限公司 | Password protection method |
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| US7337466B2 (en) * | 2003-07-08 | 2008-02-26 | Intel Corporation | Information hiding through time synchronization |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1838595A (en) * | 2005-03-25 | 2006-09-27 | 日本电气株式会社 | The authentication system and the authentication method which use a portable communication terminal |
| CN201191411Y (en) * | 2007-12-07 | 2009-02-04 | 邓康乐 | Credit card with safety device |
| CN101930511A (en) * | 2009-06-25 | 2010-12-29 | 鸿富锦精密工业（深圳）有限公司 | Password protection method |
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