KR102682578B1 - TMTO cryptocurrency decryption system and method using smart contract - Google Patents

Abstract

A TMTO decryption system using a smart contract is provided, which is formed to perform decryption of an encrypted file to be decrypted using a smart contract on a network where multiple terminals are connected. The TMTO decryption system using the smart contract according to an embodiment of the present invention verifies the password information required to perform the decryption obtained from among the plurality of terminals and the terminal for performing the decryption. A terminal providing basic decoding information configured to select and authenticate a terminal capable of being used; Selected and authenticated through the basic decryption information providing terminal obtained among the plurality of terminals to obtain verification standard information for authenticating terminals to perform the decryption, and perform the decryption that satisfies the verification standard information. A verification authentication terminal configured to authenticate a terminal for: and a decryption terminal configured to be authenticated through the authentication terminal obtained from among the plurality of terminals, receive the encryption information, and output a result of decryption.

Description

TMTO cryptocurrency decryption system and method using smart contract}

The present invention relates to a TMTO decryption system and method using a smart contract. In particular, information related to decryption can be decrypted using the TMTO method using a smart contract on a network equipped with a plurality of terminals. It relates to a TMTO decryption system and method using a smart contract.

Digital forensics is a scientific investigation technique used to prove crimes by analyzing digital evidence. Recently, the importance of digital forensic investigation can be seen frequently through the media. During the prosecution/police investigation, there is an increasing number of cases where mobile chat history, password wallet data, and information stored on mobile devices have become the key to proving crimes. This can be confirmed by data showing that the number of digital forensic analyzes per year at actual investigation sites has increased approximately 10-fold over 10 years, from 1,252 cases for the prosecution and 5,493 cases for the police in 2009 to 9,021 cases for the prosecution and 56,440 cases for the police in 2019. The need for digital forensics investigation is becoming more important.

Meanwhile, as digital evidence began to be used as important evidence to prove crimes, some criminals began encrypting the contents of files and chat applications to hide evidence. When encrypted digital evidence is collected during the investigation, if the confiscated person does not cooperate in submitting the code for the evidence, the investigative agency spends a huge amount of budget and time to conduct a thorough investigation of the code and decrypt it. In this case, there is a possibility that secondary damage may occur as digital evidence is not accepted as decryption becomes impossible within the arrest warrant request time limit (48 hours).

In addition, after requesting an arrest warrant, there is a possibility that the investigation will be delayed as additional time and costs are required to decrypt the data needed to prove evidence.

Korean Patent No. 10-1130415

In order to solve the problems of the prior art as described above, an embodiment of the present invention uses a smart contract that can reduce the time and cost of a complete password investigation by solving the TMTO problem by utilizing grid computing technology and blockchain functions. We intend to provide a TMTO decryption system and method.

According to one aspect of the present invention to solve the above problem, a TMTO decryption system using a smart contract is formed to perform decryption of an encrypted file to be decrypted using a smart contract on a network where a plurality of terminals are connected. provided.

The TMTO decryption system using the smart contract selects and authenticates a terminal that can verify the password information required to perform the decryption obtained from among the plurality of terminals and the terminal for performing the decryption. A terminal configured to provide basic decoding information; Selected and authenticated through the basic decryption information providing terminal obtained among the plurality of terminals to obtain verification standard information for authenticating terminals to perform the decryption, and perform the decryption that satisfies the verification standard information. A verification authentication terminal configured to authenticate a terminal for: and a decryption terminal configured to be authenticated through the authentication terminal obtained from among the plurality of terminals, receive the encryption information, and output a result of decryption.

The basic decryption information providing terminal includes an encryption information generation module that applies a preset hash function to header information of the encryption target file to form a TMTO chain and generates the encryption information including the TMTO chain; a verification information generation module that selects the verification and verification terminal and generates the verification standard information to be provided to the verification and verification terminal; and a decryption completion information processing module that obtains and outputs the performance result from the decryption performance terminal. The verification standard information may include either a standard decryption capability or a malicious node verification standard.

The verification and authentication terminal includes a verification standard information acquisition module that acquires the verification standard information from the basic decryption information providing terminal; And a decryption terminal authentication module that authenticates at least one terminal performing decryption from the plurality of terminals using the verification standard information, wherein the verification standard information is one of a standard decryption ability or a malicious terminal verification standard. may include.

The reference decryption ability may be a decryption time provided by providing pre-stored decryption test information to the decryption terminal and included in test decryption information performed from the decryption terminal.

The decryption terminal authentication module excludes the decryption terminal from authentication if there is no response or action from a specific decryption terminal for a preset time, and uses the malicious terminal verification standard obtained using the hash function. It can be verified whether the terminal performing decryption is the malicious terminal.

The decryption terminal includes a decryption request information generation module that generates and outputs a participation request signal for participation in the smart contract; and a decryption performance module that receives the encryption information, performs the decryption, and outputs the performance result, wherein the decryption is performed by applying the hash function to the TMTO hash chain and the existing chain. In the same case, a decryption response signal can be output as the result of the above operation.

The decryption is output as the decryption response signal as a result of the execution if one or more of the results of hashing the TMTO hash chain once to n times matches the endpoint of the existing chain. It could be something.

The decryption terminal shares the existing chain using a preset standard to prevent attacks on the execution result, verifies the execution result using the shared chain, and provides the verified execution result. It may further include a decryption result verification module outputting the decryption response signal.

According to one aspect of the present invention, a TMTO decryption method using a smart contract is provided, which is formed to perform decryption of an encrypted file to be decrypted using a smart contract on a network where a plurality of terminals are connected. The TMTO decryption method using the smart contract can verify the encryption information essential to perform the decryption and the terminal for performing the decryption using a terminal providing basic decryption information among the plurality of terminals. Selecting and authenticating a terminal; Among the plurality of terminals, verification criteria information for authenticating terminals that are selected and authenticated to perform the decryption are selected and authenticated through the basic decryption information providing terminal using a verification authentication terminal, and the verification criteria information is satisfied. authenticating a terminal to perform decryption; And a step of using a decryption performing terminal among the plurality of terminals to be authenticated through the authentication performing terminal, receiving the encryption information, and outputting a performance result that is a result of performing the decryption.

The TMTO decryption system and method using a smart contract according to an embodiment of the present invention has the effect of reducing the time and cost of a complete password investigation by solving the TMTO problem by utilizing grid computing technology and blockchain functions. .

Figure 1 is a diagram showing a TMTO decryption system using a smart contract according to an embodiment of the present invention.
Figure 2 is a block diagram showing the basic decoding information providing terminal of Figure 1.
Figure 3 is a block diagram showing the verification authentication terminal of Figure 1.
FIG. 4 is a block diagram showing the decryption terminal of FIG. 1.
Figure 5 is a diagram showing a TMTO decryption method using a smart contract according to an embodiment of the present invention.
Figure 6 is a flowchart showing step S11 of Figure 5.
Figure 7 is a flowchart showing step S13 of Figure 5.
Figure 8 is a flow chart showing step S15 of Figure 5.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts not related to the description are omitted, and identical or similar components are given the same reference numerals throughout the specification.

Figure 1 is a diagram showing a TMTO decryption system using a smart contract according to an embodiment of the present invention, Figure 2 is a block diagram showing a terminal providing basic decryption information in Figure 1, and Figure 3 is a terminal performing verification and authentication in Figure 1. It is a block diagram showing, and FIG. 4 is a block diagram showing the terminal performing decryption of FIG. 1. Hereinafter, a TMTO decryption system using a smart contract according to an embodiment of the present invention will be described using FIGS. 1 to 4.

The TMTO decryption system (1, hereinafter referred to as decryption system) using a smart contract of the present invention performs decryption using a networking system (2) in which a number of terminals exist on the network as shown in FIG. 1. formed to do so. The decryption system (1) is configured to decrypt the encrypted file (3) to be decrypted using a smart contract on a network (2) where a plurality of terminals are connected.

To this end, the decryption system 1 of the present invention may be formed to include a basic decryption information providing terminal 11, a verification authentication terminal 13, and a decryption terminal 15, as shown in FIG. 1.

The basic decryption information providing terminal 11 is set to one of a plurality of terminals so as to authenticate each terminal for performing decryption and the encryption information required to perform decryption. Here, preferably, the basic decryption information providing terminal 11 may be a terminal that can be controlled by the user performing decryption.

Figure 2 shows a block diagram of this basic decoding information providing terminal 11. Referring to FIG. 2, the basic decryption information providing terminal 11 according to an embodiment of the present invention includes an encryption information generation module 111, a verification authentication information generation module 113, and a decryption complete information processing module 115. formed to do so.

The password information generation module 111 is configured to generate password information, which is information for decrypting an encryption file to be decrypted. Here, the password information can be obtained using header information of the password file to be decrypted.

As an example, the password information generation module 111 may form a TMTO chain by creating a hash chain using header information of the encryption target file 3, and use the formed TMTO chain as password information. Here, the preset hash function may be MD5.

The verification and authentication information generation module 113 is configured to select the verification and authentication terminal 13 and generate verification standard information to provide verification standard information to the verification and authentication terminal. Here, the verification standard information may include either a standard decryption ability or a malicious node verification standard. The verification standard information may be information for verifying the decryption terminal 15, which will be described later, at the authentication terminal 13.

The decryption complete information processing module 115 is configured to obtain a performance result from the decryption performing terminal 15 and generate decryption complete information. Decryption completion information is generated when the performance result includes information that decryption of a specific TMTO chain has been completed, and the decryption completion information processing module 115 corresponds to a plurality of decryption performance terminals 15 provided on the network. Decryption of the corresponding TMTO chain can be stopped by passing the content.

The authentication performing terminal 13 is selected and authenticated through the basic decryption information providing terminal 11. The authentication terminal 13 obtains verification standard information for authenticating the decryption terminal 15 from the basic decryption information providing terminal 11, and selects a terminal that satisfies the verification standard information among a plurality of terminals as a decryption terminal. It can be verified with (15). For example, any one of terminals that have reached the authentication standard set by the user or administrator may be selected as the verification authentication terminal 13. The verification authentication terminal 13 according to an embodiment of the present invention is formed to include a verification standard information acquisition module 131 and a decryption terminal authentication module 133, as shown in FIG. 3.

The verification standard information acquisition module 131 is configured to obtain verification standard information from the basic decoding information providing terminal 11. As described above, the verification standard information may be information for verifying the decryption terminal 15 at the authentication terminal 13, and may include either a standard decryption ability or a malicious node verification standard.

The decryption terminal authentication module 133 is configured to authenticate at least one decryption performing terminal 15 from a plurality of terminals using verification standard information. The decryption terminal authentication module 133 may acquire the decryption ability for each of a plurality of terminals using the standard decryption ability, and use the result to authenticate the decryption performing terminal 15.

Here, the standard decryption ability may be the standard time required for decryption of each terminal. The decryption terminal authentication module 133 provides decryption test information pre-stored in each of the plurality of terminals in order to authenticate the decryption terminal 15 using a standard decryption ability. When the plurality of terminals acquire the decryption test information, they can perform decryption using the decryption test information, generate test decryption information as a result of the decryption, and transmit it to the decryption terminal authentication module 133.

The decryption terminal authentication module 133 extracts the decryption accuracy and decryption time included in the test decryption information obtained from each terminal, and determines whether the accuracy and time are higher or higher compared to the accuracy and time included in the obtained reference decryption ability. Terminals from which the same accuracy and the same or shorter time have been extracted can be authenticated by the decryption performing terminal 15. In addition, the decryption terminal authentication module 133 will not authenticate as the decryption performing terminal 15 a terminal whose extracted accuracy and time are low accuracy or long compared to the accuracy and time included in the obtained standard decryption ability. You can. Through this, the decryption system 1 of the present invention can amplify the effect of the present invention by authenticating only terminals with performance that satisfies preset standards among a plurality of terminals as the decryption performing terminal 15.

Additionally, the decryption terminal authentication module 133 may exclude the decryption terminal 15 from authentication if there is no response or action from the authenticated decryption terminal 15 for a preset time.

Furthermore, the decryption terminal authentication module 133 further determines whether the authenticated decryption terminal 15 is a malicious terminal for performing a malicious attack, and as a result of the determination, the decryption terminal 15 is a malicious terminal. If it is determined that this is the case, the terminal may be excluded from authentication.

As an example, the decryption terminal authentication module 133 obtains a malicious terminal verification standard generated using a hash function used to generate password information of the present invention, and uses this to verify whether the decryption terminal 15 is a malicious terminal. You may.

Meanwhile, Figure 4 shows a decryption terminal 15 according to an embodiment of the present invention. The decryption terminal 15 of the present invention is a terminal that has been authenticated through the authentication terminal 13 as described above, and is configured to receive encryption information and output a result of decryption, and for this purpose, the encryption device It may be formed to include a decryption desired information generation module 151 and a decryption performance module 153.

The decryption request information generation module 151 is configured to generate and output a participation request signal for participation in the smart contract. In the present invention, in order for a plurality of terminals to be authenticated as a decryption terminal 15 through the authentication terminal 13, decryption desired information must first be generated and output in the plurality of terminals. The decryption desired information may be information requesting authentication of the terminal that generated the information.

In addition, if the decryption desired information generation module 151 does not want to perform further decryption, it cancels authentication from the verification authentication terminal 13 by not generating a response or action for a preset time as described above. You may.

The decryption performance module 153 is configured to receive encryption information, perform decryption, and output the results. The decryption performing module 153 may use the TMTO hash chain included in the password information for decryption. The decryption performance module 153 may output a decryption response signal as an execution result when the value obtained by applying the hash function to the TMTO hash chain and the existing chain is the same. The decryption response signal may include information that the decryption performing module 153 can decrypt the encrypted file to be decrypted using the existing chain.

Meanwhile, as shown in FIG. 4, the decryption terminal 15 of the present invention may further include a decryption verification module 155. The decryption verification module 155 is configured to perform verification of the decryption response signal to ensure reliability of the decryption response signal. The decryption result verification module 155 is configured to share the chain held by the decryption performance module 153 with other decryption terminals 15 using a preset standard, and perform other decryption using the shared chain. Decryption may be performed in the decryption verification module 155 of the terminal 15, and if the results match, a verified performance result may be obtained, and the obtained verified performance result may be output as a decryption response signal. .

Through this, the decryption system 1 of an embodiment of the present invention can have the effect of reducing the possibility of performing decryption using incorrect decryption results through external malicious attacks.

Meanwhile, Figures 5 to 8 show a TMTO decryption method using a smart contract according to an embodiment of the present invention. Figure 5 is a diagram showing a TMTO decryption method using a smart contract according to an embodiment of the present invention, Figure 6 is a flow chart showing step S11 in Figure 5, Figure 7 is a flow chart showing step S13 in Figure 5, 8 is a flowchart showing step S15 of FIG. 5.

Hereinafter, for convenience of explanation, the present method will be described as being performed using the decryption system of Figures 1 to 4, but this is not an essential component of the present invention, and the present invention includes devices, systems, and terminals capable of performing similar operations. It is obvious that it can be implemented through etc.

The TMTO decryption method (10, hereinafter referred to as the decryption method) using a smart contract of the present invention performs decryption using a networking system (2) in which a number of terminals exist on the network, as shown in FIG. 1. formed to do so. The decryption method 10 is designed to decrypt the encrypted file 3 to be decrypted using a smart contract on a network 2 to which a plurality of terminals are connected.

To this end, as shown in FIG. 5, the decryption method 10 of the present invention includes a step of selecting and authenticating a terminal performing authentication (S11), a step of authenticating a terminal performing decryption (S13), and the result of performing decryption. It may be configured to include a step (S15) of outputting the performance result.

The step (S11) of selecting and authenticating a terminal performing authentication is set using a terminal providing basic decryption information among a plurality of terminals to authenticate each terminal for performing decryption and the password information required to perform decryption. do. Here, preferably, the terminal providing basic decryption information may be a terminal that can be controlled by the user performing decryption.

Figure 6 shows a block diagram of the step (S11) of selecting and authenticating such verification and authentication terminal. Referring to FIG. 6, the step of selecting and authenticating a verification authentication terminal according to an embodiment of the present invention (S11) includes generating password information (S111), generating verification information (S113), and completing decryption. It is formed to include a step of processing information (S115).

The step of generating password information (S111) is designed to generate password information that is information for decrypting the target password file. Here, the encryption information can be obtained using header information of the encryption file to be decrypted.

In the step of generating password information (S111), for example, a TMTO chain can be formed by creating a hash chain using header information of the encryption target file 3, and the formed TMTO chain can be used as password information. Here, the preset hash function may be MD5.

The step of generating verification and authentication information (S113) is formed to select a verification and authentication terminal and generate verification standard information to provide verification standard information to the verification and authentication terminal. Here, the verification standard information may include either a standard decryption ability or a malicious node verification standard. The verification standard information may be information for verifying the decryption terminal 15 in step S13 of authenticating the decryption terminal 15, which will be described later.

The step of processing the decryption complete information (S115) is formed to generate the decryption complete information by obtaining the performance result from the step of outputting the decryption result (S15). Decryption completion information is generated when the performance result includes information that decryption of a specific TMTO chain has been completed, and the step of processing the decryption completion information (S115) is the result of performing a plurality of decryptions provided on the network. Decryption of the corresponding TMTO chain can be stopped by passing the corresponding contents to the step of outputting the execution result (S15).

The step (S13) of authenticating the decryption terminal is performed using the verification and authentication terminal selected and authenticated through the step (S11) of selecting and authenticating the verification and authentication terminal. The step (S13) of authenticating the decryption terminal acquires verification standard information for authenticating the decryption terminal from the step (S11) of selecting and authenticating the authentication terminal, and selects the terminal that satisfies the verification standard information among the plurality of terminals. The terminal can be authenticated as a terminal performing decryption. For example, any one of terminals that have reached the authentication standard set by the user or administrator may be selected as the terminal performing verification authentication. The step (S13) of authenticating a decryption terminal according to an embodiment of the present invention includes the step of obtaining verification standard information (S131) and the step of authenticating the decryption terminal (S133), as shown in FIG. formed to do so.

The step of acquiring verification standard information (S131) is formed to obtain the verification standard information from the step of selecting and authenticating the verification authentication terminal (S11). As described above, the verification standard information may be information for verifying the decryption terminal in the step (S13) of authenticating the decryption terminal, and may include either a standard decryption ability or a malicious node verification standard. .

The step of authenticating the decryption terminal (S133) is performed to authenticate at least one terminal performing decryption from a plurality of terminals using verification standard information. In the step of authenticating the decryption terminal (S133), the decryption ability of each of the plurality of terminals can be obtained using the standard decryption ability, and the result can be used to authenticate the decryption terminal.

Here, the standard decryption ability may be the standard time required for decryption of each terminal. In the step of authenticating the decryption terminal (S133), decryption test information pre-stored in each of the plurality of terminals is provided to authenticate the decryption terminal using the standard decryption ability. When the plurality of terminals acquire the decryption test information, they can perform decryption using the decryption test information, generate test decryption information as a result of the performance, and transmit it to the step (S133) of authenticating the decryption terminal.

The step of authenticating the decryption terminal (S133) extracts the decryption accuracy and decryption time included in the test decryption information obtained from each terminal, and compares the accuracy and time with the accuracy and time included in the obtained standard decryption ability. Therefore, authentication can be performed with a terminal that performs decryption for a terminal that has been extracted with higher or equal accuracy and the same or shorter time. In addition, in the step (S133) of authenticating the decryption terminal, a terminal whose extracted accuracy and time are low accuracy or long compared to the accuracy and time included in the obtained standard decryption ability will not be authenticated as a decryption terminal. You can. Through this, the decryption method 10 of the present invention can amplify the effect of the present invention by authenticating only terminals with performance that satisfies preset standards among a plurality of terminals as decryption performing terminals.

Additionally, in the step (S133) of authenticating the decryption terminal, if there is no response or action from the authenticated decryption terminal for a preset time, the corresponding decryption terminal may be excluded from authentication.

Furthermore, the step of authenticating the decryption terminal (S133) further determines whether the authenticated decryption terminal is a malicious terminal for performing a malicious attack, and as a result of the determination, the performance result that is the result of performing the decryption is provided. If the output step (S15) is determined to be a malicious terminal, the terminal may be excluded from authentication.

As an example, the step of authenticating the decryption terminal (S133) involves obtaining a malicious terminal verification standard generated using the hash function used to generate the password information of the present invention, and using this to verify whether the terminal performing the decryption is a malicious terminal. You may.

Meanwhile, Figure 8 shows a step (S15) of outputting a result of decryption according to an embodiment of the present invention. The decryption terminals used in the step (S15) of outputting the decryption result of the present invention are terminals that have been authenticated through the step (S13) of authenticating the decryption terminal as described above. It is configured to receive information and output a performance result that is the result of decryption, and may be configured to include a step of generating decryption desired information (S151) and a step of performing decryption (S153).

The step of generating decryption desire information (S151) is configured to generate and output a participation desire signal for participation in the smart contract. In the present invention, in order for a plurality of terminals to be authenticated as a decryption terminal through the step (S13) of authenticating the decryption terminal, the plurality of terminals must first generate and output decryption desired information. The decryption desired information may be information requesting authentication of the terminal that generated the information.

In addition, the step of generating decryption desired information (S151) is a step of authenticating the decryption performing terminal by not generating a response or action for a preset time as described above when no further decryption is desired (S151). Authentication for the terminal performing decryption from S13) may be revoked.

The step of performing decryption (S153) is performed to receive encryption information, perform decryption, and output the result. The step of performing decryption (S153) may use the TMTO hash chain included in the password information for decryption. In the step of performing decryption (S153), if the value of applying the hash function to the TMTO hash chain and the existing chain is the same, a decryption response signal can be output as a result of the decryption. The decryption response signal may include information that the decryption step (S153) can decrypt the encrypted file to be decrypted using the existing chain.

Meanwhile, as shown in FIG. 8, the step (S15) of outputting a result of decryption of the present invention may further include a step of performing decryption verification (S155). The step of performing decryption verification (S155) is configured to perform verification of the decryption response signal to ensure trust in the decryption response signal. The decryption verification step (S155) is formed to share the chain held by the decryption step (S153) using a preset standard with other decryption terminals, and the decryption verification is performed using the shared chain. In the performing step (S155), decryption is performed, and if the results match, a verified performance result is obtained, and the obtained verified performance result can be output as a decryption response signal.

Through this, the decryption method 10 of an embodiment of the present invention can have the effect of reducing the possibility of performing decryption using an incorrect decryption result through an external malicious attack.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiment presented in the present specification, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same spirit. , other embodiments can be easily proposed by change, deletion, addition, etc., but this will also be said to be within the scope of the present invention.

1: TMTO decryption system and method using smart contract
2: Grid computer/distributed network
3: Encrypted files to be decrypted
11: Basic decoding information provision terminal
13: Verification authentication terminal
15: Terminal performing decryption
111: Password information generation module
113: Verification authentication information creation module
115: Decryption completed information processing module
131: Verification standard information acquisition module
133: Decryption terminal authentication module
151: Decryption desired information generation module
153: Decryption performance module
155: Decoding result verification module

Claims (9)

In the TMTO decryption system using a smart contract that is formed to perform decryption of the encrypted file to be decrypted using a smart contract on a network where a plurality of terminals are connected,
The TMTO decryption system using the smart contract is,
a basic decryption information providing terminal configured to select and authenticate a terminal capable of verifying the encryption information essential for performing the decryption and the terminal for performing the decryption obtained from among the plurality of terminals;
Selected and authenticated through the basic decryption information providing terminal obtained among the plurality of terminals to obtain verification standard information for authenticating terminals to perform the decryption, and perform the decryption that satisfies the verification standard information. A verification authentication terminal configured to authenticate a terminal for: and
A decryption terminal configured to be authenticated through the authentication terminal obtained from among the plurality of terminals, receive the encryption information, and output a result of decryption,
The decryption terminal is,
A decryption request information generation module that generates and outputs a participation request signal indicating a desire to participate in the smart contract; and
It includes a decryption performing module that receives the encryption information, performs the decryption, and outputs the performance result,
The decryption is a TMTO decryption system using a smart contract that outputs a decryption response signal as a result of the decryption when the value of applying the hash function to the TMTO hash chain and the existing chain is the same. According to clause 1,
The basic decoding information providing terminal is,
a password information generation module that forms the TMTO hash chain by applying the preset hash function to header information of the encrypted file to be decrypted, and generates the password information including the TMTO hash chain;
a verification information generation module that selects the verification and verification terminal and generates the verification standard information to be provided to the verification and verification terminal; and
It includes a decryption completion information processing module that obtains and outputs the performance result from the decryption performance terminal,
The verification standard information is a TMTO decryption system using a smart contract that includes either a standard decryption ability or a malicious node verification standard. According to clause 1,
The verification and authentication terminal is,
a verification standard information acquisition module that acquires the verification standard information from the basic decoding information providing terminal; and
It includes a decryption terminal authentication module that authenticates at least one terminal performing decryption from the plurality of terminals using the verification standard information,
The verification standard information is a TMTO decryption system using a smart contract that includes either a standard decryption ability or a malicious terminal verification standard. According to clause 3,
The standard decryption ability provides decryption test information pre-stored to the decryption terminal, and is a decryption time included in the test decryption information performed from the decryption terminal. TMTO decryption system using a smart contract. According to clause 3,
The decryption terminal authentication module excludes the decryption terminal from authentication if there is no response or action from a specific decryption terminal for a preset time,
A TMTO decryption system using a smart contract that verifies whether the decryption performing terminal is the malicious terminal using the malicious terminal verification standard obtained using the hash function. delete According to clause 1,
The decryption is,
If one or more of the results of hashing the TMTO hash chain once to n times matches the endpoint of the existing chain, a smart contract that outputs the decryption response signal as the result of the execution TMTO decryption system used. According to clause 7,
The decryption terminal is,
In order to prevent attacks on the execution results, the existing chain is shared using a preset standard, the execution result is verified using the shared chain, and the verified execution result is output as the decryption response signal. A TMTO decryption system using a smart contract that further includes a decryption result verification module. In the TMTO decryption method using a smart contract formed to perform decryption of an encrypted file to be decrypted using a smart contract on a network where a plurality of terminals are connected,
The TMTO decryption method using the smart contract is:
selecting and authenticating, among the plurality of terminals, a terminal capable of verifying the encryption information essential for performing the decryption and the terminal for performing the decryption using a terminal providing basic decryption information;
Among the plurality of terminals, verification criteria information for authenticating terminals that are selected and authenticated to perform the decryption are selected and authenticated through the basic decryption information providing terminal using a verification authentication terminal, and the verification criteria information is satisfied. authenticating a terminal to perform decryption; and
A step of using a decryption performing terminal among the plurality of terminals to be authenticated through the authentication performing terminal, receiving the password information, and outputting a performance result that is a result of performing the decryption,
The step of outputting the execution result is,
A decryption request information generation step of generating and outputting a participation request signal indicating a desire to participate in the smart contract; and
A decryption performance step of receiving the encryption information, performing the decryption, and outputting the performance result,
The decryption is a TMTO decryption method using a smart contract that outputs a decryption response signal as a result of the decryption when the value of applying the hash function to the TMTO hash chain and the existing chain is the same.