CN114362970B - Ring signature method, system, storage medium and equipment based on intelligent contract - Google Patents

Abstract

The present invention provides a smart contract-based ring signature method, system, storage medium and device. The method includes: obtaining a public key of a participant and generating an initial random number; encrypting the data of the initial random number, and encrypting the obtained random number ciphertext Send it to the corresponding participants, so that the participants can decrypt the original random number, and perform data processing on the original random number to obtain the target random number; the target random number is calculated to obtain the approval ratio, and the public and private key pairs of the implementer are randomly generated. The participant's public key is combined with the implementer's public-private key pair and the approval ratio to perform ring signature and generate the signature result. The above-mentioned ring signature method, system, storage medium and device based on smart contracts, through the research on the collective ring signature scenario, makes the ring signature independent of the number of participants, realizes the rapid response of transaction data, improves the signature efficiency, and solves the problem of existing problems. There is a technical problem of low signature efficiency in technology.

Description

A smart contract-based ring signature method, system, storage medium and device

technical field

The present invention relates to the technical field of blockchain, in particular to a ring signature method, system, storage medium and device based on a smart contract.

Background technique

Ring signatures are evolved from group signatures. Unlike group signatures, which have a group administrator as the center, ring signatures do not rely on such a center. In simple terms, ring signatures are spontaneous, that is, a user in the ring arbitrarily selects the public keys of other users to jointly form a ring required for a signature, which is used to hide the user's public key, and other users on the ring. The signer's identity is kept private without any knowledge that they are added to the ring.

Among the existing technologies, the research scope of ring signatures mainly focuses on the protection of identity information in a single transaction, and the direction of optimization is also to improve the internal structure of ring signatures. The lack of research on collective ring signature scenarios has led to the existing ring signature In the face of application scenarios that require a large number of signatures, the method cannot achieve fast response to high-frequency transaction data, which makes the signature efficiency of the existing ring signature method low.

SUMMARY OF THE INVENTION

Based on this, the purpose of the present invention is to provide a smart contract-based ring signature method, system, storage medium and device, which are used to solve the ring signature solution in the prior art when faced with application scenarios that require a large number of signatures. The rapid response of high-frequency transaction data leads to the technical problem of low signature efficiency.

One aspect of the present invention provides a ring signature method based on a smart contract, the method comprising:

Obtain the public keys of all participants, and generate multiple sets of initial random numbers corresponding to the number of participants;

Perform data encryption on the initial random number according to the public key of the participant, and send the ciphertext of the random number obtained by the data encryption to the corresponding participant, so that the participant can decrypt the ciphertext of the random number according to his own private key to obtain a random number The original text, and combined with their own opinions, perform data processing on the original random number to obtain the target random number;

Calculate the target random number combined with the number of participants to obtain the approval ratio, and randomly generate a public-private key pair of the implementer according to the key generation algorithm, and combine the public-private key pair of the implementer and the approval according to the public key of the participant. Proportionally performs ring signatures and generates signature results.

The above smart contract-based ring signature method encrypts the data of the initial random number according to the public key of the participant, and sends the ciphertext of the random number obtained by the data encryption to the corresponding participant, so that the participant can decrypt the random number according to his own private key. The original random number is obtained by counting the ciphertext, and the target random number is obtained by data processing of the original random number in combination with its own opinions, so that the smart contract can obtain the overall opinion of each participant, and then the ring signature is performed on the obtained overall opinion to realize the right Research on the collective ring signature scenario, so that only one ring signature can complete the collection of participants' opinions, so that the ring signature has nothing to do with the number of participants, realizes the rapid response of transaction data, and improves the efficiency of signatures. Further, according to The participant's public key is combined with the implementer's public-private key pair and the approval ratio to perform a ring signature and generate a signature result. By optimizing the outside of the ring signature and then adding it to the existing ring signature scheme, the optimized scheme is suitable for the ring signature. It has portability, further improves the performance of ring signatures, and solves the technical problem of low signature efficiency due to the inability to achieve rapid response to high-frequency transaction data when faced with application scenarios that require a large number of signatures in the ring signature scheme in the prior art. .

In addition, according to the above-mentioned smart contract-based ring signature method of the present invention, it can also have the following additional technical features:

Further, in the step of performing data processing on the original text of the random number to obtain the target random number in combination with one's own opinion, the data processing includes:

If yes, add 1 to the initial random number;

In the event of objection or abstention, the initial random number remains unchanged.

Further, the step of performing ring signature according to the public key of the participant in combination with the public-private key pair of the implementer and the approval ratio and generating the signature result includes:

Obtain the signature result and distribute the signature result to each participant, and perform signature verification on the signature result in combination with a preset ratio.

Further, the step of performing signature verification on the signature result in combination with a preset ratio includes:

Perform signature verification on the signature result in combination with a preset ratio, and determine whether the signature result is valid;

If the signature is invalid, the verification result is displayed as invalid;

If the signature is valid, comparing the preset ratio with the approval ratio to determine whether the approval ratio is greater than the preset ratio;

If so, the final overall signature opinion generated is in favor;

If not, the final overall signature opinion generated is against.

Further, before the step of obtaining the approval ratio by calculating the target random number in combination with the number of participants includes:

The target random number is uploaded to the blockchain without encryption.

Further, the step of obtaining the approval ratio by calculating the target random number in combination with the number of participants includes:

calculating the difference between the target random number and the initial random number to obtain the number of approvals;

The approval ratio is obtained according to the number of approvals combined with the number of participants.

Further, the target random number only displays the overall opinion of all participants, and does not involve detailed opinion information of each participant.

Another aspect of the present invention provides a ring signature system based on a smart contract, the system comprising:

The acquisition module is used to acquire the public keys of all participants and generate multiple groups of initial random numbers corresponding to the number of participants;

The data processing module is used for performing data encryption on the initial random number according to the public key of the participant, and sending the ciphertext of the random number obtained by the data encryption to the corresponding participant, so that the participant can decrypt the random number according to the private key of the participant. The original random number is obtained by counting the ciphertext, and the original random number is obtained by data processing in combination with its own opinions;

The signature module is used to calculate the target random number combined with the number of participants to obtain the approval ratio, and randomly generate a public-private key pair of the implementer according to the key generation algorithm, and combine the public-private key pair of the implementer according to the public key of the participant , and the approval ratio to perform ring signature and generate a signature result.

Another aspect of the present invention provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the above-mentioned smart contract-based ring signature method.

Another aspect of the present invention also provides a data processing device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the above-mentioned smart contract-based program when the processor executes the program the ring signature method.

Description of drawings

1 is a schematic diagram of a ring signature in the prior art;

Fig. 2 is the step diagram of the ring signature method based on the smart contract in the first embodiment of the present invention;

3 is a schematic diagram of a ring signature in the application of the present invention;

Fig. 4 is a schematic diagram of multi-party secure computing;

Fig. 5 is the signature flow chart in the ring signature in the application of the present invention;

Fig. 6 is the signature verification flow chart;

Fig. 7 is the step diagram of the ring signature method based on the smart contract in the second embodiment of the present invention;

FIG. 8 is a system block diagram of a ring signature system based on a smart contract in a third embodiment of the present invention.

The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Several embodiments of the invention are presented in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

FIG. 1 is a schematic diagram of a ring signature in the prior art. The essence of a ring signature is a signature composed of multiple keys. In the process of constructing a signature, a ring association is formed between some of its parameters. Let: pk is the public key set, S is a random array, C is the generated challenge array, and the subscripts of different parameters indicate the identity of the participants. Among them, the challenges generated by the participants will form a circular association according to specific rules. If the participants have been arranged in order, operate according to formula (1), formula (1) is as follows:

Among them, G is the base point of the elliptic curve, m represents the signed data, I=SK _S H _P (P _S ) is the key image, P _S is the private key of the signature implementer, H and H _P represent two different hash Hierarchy function. Specifically, the challenge C i corresponding to the next participant _i is composed of the previous participant's challenge C _{i- 1} , the public key pk _{i- 1} and the random number S _{i - 1} , which are executed sequentially according to this rule. When the last participant generates the challenge, adding its public key and random number can generate the challenge for the first participant. Finally, a loop is formed, showing a ring in the form of expression. In this process, in order to be able to form a closed loop, it is necessary to start the signature from the private key. Unlike the public key, the challenge of generating the private key is shown in formula (2). The formula (2) is as follows:

The private key owner generates the challenge by replacing the random number S _s with the random number u , and in this process, there is no need to use its own corresponding challenge C _s . Specifically, the S _s generated by the formula (3) is substituted into the formula (1). , and formula (2) is obtained, that is, as shown in formula (4), the remaining participants generate challenges according to formula (1). When the private key owner also obtains the corresponding challenge C _s , the closed loop is completed. Different from other participants, the random number S _s of the private key owner is not randomly generated, but constructed from the private key SK _S and the random number u . The construction process is shown in formula (3), and formula (3) is as follows:

S _s =uC _s ×SK _S (3)

Formula (4) is as follows:

。At this point, the ring signature is complete and the signature is

.

In the prior art, the interior of the ring signature is generally optimized, so that the ring signature solution in the prior art cannot achieve a rapid response to high-frequency transaction data when faced with application scenarios requiring a large number of signatures, resulting in low signature efficiency. In the solution of the present application, by optimizing the outside of the ring signature, the current best ring signature algorithm can be transplanted, and on this basis, the performance of the ring signature is further improved. On the other hand, the prior art researches on single signature. In this application scheme, research on collective signature expands the application scope of ring signature, introduces multi-party secure computing to collect opinions from multiple participants, and adopts intelligent As a trusted organization, the contract implements a secure ring signature, and has better performance in the face of high-frequency collective signatures.

Example 1

Please refer to FIG. 2 , which shows the smart contract-based ring signature method in the first embodiment of the present invention. The method includes steps S101 to S103:

S101. Obtain public keys of all participants, and generate multiple groups of initial random numbers corresponding to the number of participants.

FIG. 3 is a schematic diagram of the ring signature in the application of the present invention. The smart contract is the implementation subject of the ring signature in the invention application and the owner of the private key in the ring signature. In addition to smart contracts, participants also include public key owners in ring signatures. Blockchain acts as the carrier of data interaction between smart contracts and participants. The signing steps are: first, the smart contract initiates a ring signature event to obtain the public keys of all members participating in this ring signature; then, uses multi-party secure computing to obtain the opinions of the participants; after that, generates a public-private key pair in the smart contract, using The private key in the key pair and the public keys of all participants are ring signed; finally, the signature is published to the blockchain to complete the signature. In the whole ring signature process, the smart contract adopts the one-time secret signature scheme. The public key of the smart contract is randomly generated, and other participants cannot obtain the public key, and each round of ring signature requires the use of the public key of all participants, so the signature of the smart contract cannot be forged. The participant opinions collected by the smart contract will be processed according to formula (5), which is as follows:

为赞成比例，v为赞成人数，n代表除智能合约外的参与者人数，智能合约不对总体意见进行定性，而是将赞成比例

作为参数添加到签名中，组成

。在签名验证阶段，赞成比例和预先设定的系数将进行比较，然后确定最终意见，从而更符合实际需要。最后，与改进前的环签名相比，本申请使用的环签名方法只需要一次环签名就可完成参与者意见的收集。in,

is the approval ratio, v is the number of approvals, n represents the number of participants except for the smart contract, the smart contract does not characterize the overall opinion, but the percentage of approval

added as a parameter to the signature, consisting of

. In the signature verification stage, the approval ratio and the pre-set coefficients will be compared, and then the final opinion will be determined, which is more in line with the actual needs. Finally, compared with the ring signature before the improvement, the ring signature method used in this application only needs one ring signature to complete the collection of participants' opinions.

S102: Encrypt the data of the initial random number according to the public key of the participant, and send the ciphertext of the random number obtained by the data encryption to the corresponding participant, so that the participant can decrypt the ciphertext of the random number according to the private key of the participant to obtain the original text of the random number, And combined with their own opinions, the original random number data is processed to obtain the target random number.

，N*为正整数），并使用参与者的公钥对这些随机数逐一加密，之后将随机数密文发送给对应的参与者；参与者使用自身的私钥进行解密获取随机数原文，然后根据自身意见进行处理，如果赞成就将随机数进行加一，如果反对或者弃权，随机数保持不变，最后将处理完毕的随机数发送给智能合约；智能合约收集完所有参与者处理后的随机数后，将根据公式（6）进行计算，获取参与者的整体意见情况，公式（6）具体如下：Figure 4 is a schematic diagram of multi-party secure computing. Multi-party secure computing is a method in which multiple participants complete a computing task without revealing their privacy. This application uses the principle of multi-party secure computing to complete the collection of ring signature participants' opinions. In the multi-party secure calculation, an organization is required to comprehensively calculate the data. In this application scheme, a smart contract is used as a calculation intermediary. It is divided into two steps: first, the smart contract collects the public keys of all participants; then, generates a random number corresponding to the number of participants ( x _i is the random number of the corresponding participant,

, N* is a positive integer), and use the public key of the participant to encrypt these random numbers one by one, and then send the random number ciphertext to the corresponding participant; the participant uses his own private key to decrypt the random number to obtain the original text, and then According to their own opinions, the random number will be increased by one if they are in favor. If they are opposed or abstained, the random number will remain unchanged. Finally, the processed random number will be sent to the smart contract; the smart contract will collect the random number processed by all participants. After counting, it will be calculated according to the formula (6) to obtain the overall opinions of the participants. The formula (6) is as follows:

v=N ^' -N (6)

Where v is the number of people who agree, N ^' is the sum of the random numbers processed by all participants, and N is the sum of the generated random numbers. In the whole process, the smart contract and the participants do not directly interact with data, but need to be stored in the blockchain; the random number generated by the smart contract needs to be encrypted before being transmitted, and the random number processed by the participants can be original transmission. In this process, the participants cannot learn about the random number processing of others, thus hiding the participants' opinions. In this application, as a trusted third party, the smart contract will not disclose the user's private data, and the calculated result only shows the overall opinions of the participants, and does not involve the detailed opinions of each participant. Therefore, the multi-party secure computing method used in this application can effectively hide participants' opinions and complete the overall opinion collection.

It should be further noted that the random number mentioned in the above steps is a random number used for multi-party secure calculation, while the random number mentioned in Figure 5 is a random number used for participating in ring signatures. different in nature.

S103. Calculate the target random number combined with the number of participants to obtain the approval ratio, and randomly generate a public-private key pair of the implementer according to the key generation algorithm, and perform a ring signature according to the public key of the participant combined with the public-private key pair of the implementer and the approval ratio and generate the signature result.

In this application, the public-private key pair is randomly generated, and each ring signature needs to be regenerated, so that each signature corresponds to a different key, that is, "one-sign-one-crypto" is realized. Collecting the opinions of the signatory through multi-party secure calculation, protecting the privacy of the signatory in the process of data interaction in the alliance chain, and using smart contract technology to organize the signature process, the "one-sign-one-secret" signature strategy formulated to ensure that the signature cannot be forgery.

FIG. 5 is a flow chart of the signature in the ring signature in the application of the present invention. The prerequisites are that the public keys of all participants have been obtained in the smart contract and the number of votes in favor of votes has been obtained through multi-party secure calculation. First, divide the number of approval opinions by the number of participants, and the quotient is used as the approval ratio; then call the key generation algorithm to obtain a set of public and private key pairs, add the public key to the public key group composed of participants, and call the private key as a parameter The mirror function generates a key mirror. After that, start the formal ring signature, start processing from the private key, generate a random number u , and calculate according to formula (2) to obtain the challenge C _S+1 of the next signer;

Next, the public keys other than the smart contract are processed one by one. When signing each public key, a random number S _i needs to be generated, and the next challenge is calculated according to formula (1). When the subscript of the challenge value reaches the length of the array Replace the challenge with the subscript 0 until the challenge CS corresponding to the _subscript of the private key is calculated. At this time, all public keys are signed;

以及生成的C ₀ 和所有参与者生成的随机数组S一并加入签名中，到此环签名完成。Then according to the obtained challenge C _S , the random number S _S corresponding to the private key is calculated according to formula (3). The random array is S, S _S =S[s], which is an element of the array; finally, the content m of the signature, Approval ratio

And the generated C ₀ and the random array S generated by all participants are added to the signature, and the ring signature is completed.

和预设比例P，再从环签名中获取随机数组S；然后按照公式（1）计算出挑战，从C ₁ 开始，按顺序一直重复计算出C _n ，并赋值给C ₀ ，n为随机数组S长度；之后验证计算的C ₀ 和签名中的是否一致，不一致则验证失败，一致则使用预设比例P和签名中的赞成比例

进行对比，得出最终总体签名意见（赞成比例大于等于预设比例，表示赞成，否则反对），验证结束。Ring signature includes a signature phase and a verification phase, as shown in Figure 6 for the signature verification flow chart. Get the ring signature first

and the preset ratio P , and then obtain the random array S from the ring signature; then calculate the challenge according to formula (1), starting from C ₁ , repeatedly calculate C _n in sequence, and assign it to C ₀ , n is a random array S length; then verify whether the calculated C ₀ is consistent with that in the signature. If they are inconsistent, the verification fails. If they are consistent, the preset ratio P and the approval ratio in the signature are used.

Make a comparison to get the final overall signature opinion (the percentage of approval is greater than or equal to the preset percentage, indicating approval, otherwise disapproval), and the verification is over.

To sum up, the ring signature method based on the smart contract in the above-mentioned embodiments of the present invention encrypts the data of the initial random number according to the public key of the participant, and sends the ciphertext of the random number obtained by encrypting the data to the corresponding participant, so that the Let the participants decrypt the random number ciphertext according to their own private keys to obtain the original random number, and combine their own opinions to process the original random number to obtain the target random number, so that the smart contract can obtain the overall opinion of each participant, and then the obtained random number is obtained. The overall opinion of the network is ring signed, and the research on the collective ring signature scene is realized, so that only one ring signature can complete the collection of participants' opinions, so that the ring signature has nothing to do with the number of participants, and realizes the rapid response of transaction data. The efficiency of signing is improved. Further, according to the public key of the participant, the public and private key pair of the implementer, and the approval ratio, the ring signature is performed and the signature result is generated. After optimizing the outside of the ring signature, it is added to the existing ring signature scheme. , making the optimized scheme portable for ring signatures, further improving the performance of ring signatures, and solving the ring signature scheme in the prior art, when faced with application scenarios that require a large number of signatures, it cannot achieve high-frequency transaction data. Quick response to technical issues that lead to inefficient signatures.

Embodiment 2

Please refer to FIG. 7, which shows a smart contract-based ring signature method in the second embodiment of the present invention: the method includes steps S201 to S205:

S201. Obtain public keys of all participants, and generate multiple groups of initial random numbers corresponding to the number of participants.

The scheme in this application is explained by taking the example of a class voting on Zhang San to decide whether to hold the position of monitor. It is stipulated that if half or more of the affirmative votes are obtained, the election will be successful. This voting adopts the voting system in the application scheme. In the initial stage, each member of the class registers an account on the platform, and the system will generate a unique public and private key pair for it. The class teacher initiates a voting event on the platform, and class members upload their public keys to the system.

S202: Encrypt the data of the initial random number according to the public key of the participant, and send the ciphertext of the random number obtained by the data encryption to the corresponding participant, so that the participant can decrypt the ciphertext of the random number according to the private key of the participant to obtain the original text of the random number, And combined with their own opinions, the original random number data is processed to obtain the target random number.

In the above steps, it should be further explained that the target random number only displays the overall opinion of all participants, and does not involve the detailed opinion information of each participant. Further, the data processing includes: adding 1 to the initial random number if approved; if opposing or abstaining, the initial random number remains unchanged.

As a specific example, inside the system (smart contract), each class member is assigned a random number, encrypted with its uploaded public key, and then the encrypted random number is sent to each member. After the members of the class obtain the encrypted random number, they can obtain the original random number by decrypting with their private key. At this point, a selection bar for yes and no will pop up on the interface. If you choose yes, the random number will automatically increase by one. If you choose no, the random number will remain unchanged. When the selection is complete, the processed random number will be uploaded to the system (smart contract).

S203, upload the target random number to the blockchain without encryption.

S204: Calculate the target random number combined with the number of participants to obtain the approval ratio, and randomly generate a public-private key pair of the implementer according to the key generation algorithm, and perform a ring signature according to the public key of the participant combined with the public-private key pair of the implementer and the approval ratio and generate the signature result.

Specifically, the difference between the target random number and the initial random number is calculated to obtain the number of approvals; the approval ratio is obtained according to the number of approvals combined with the number of participants.

As a specific example, the system can calculate the number of votes in favor based on the collected random numbers and the allocated random numbers, and combine the number of votes to obtain the approval ratio. At this point, the system triggers a signature event. First, a set of public and private key pairs are randomly generated in the system, and then the preset ring signature algorithm is called with the obtained public keys of all voters and the public and private key pairs generated by the system as parameters. Generate a signature, and add the approval ratio to the signature as the final signature result.

S205: Obtain the signature result and distribute the signature result to each participant, and perform signature verification on the signature result in combination with a preset ratio.

Specifically, the step of performing signature verification includes: performing signature verification on the signature result in combination with a preset ratio, and judging whether the signature result is valid; if the signature is invalid, displaying that the verification result is invalid; if the signature is valid, comparing the pre-approved ratio Set the ratio to determine whether the approval ratio is greater than the preset ratio; if so, the final overall signature opinion generated is in favour; if not, the final overall signature opinion generated is against.

After the signing, the system will send the signature to each class member, and the class members can enter a preset ratio (that is, the minimum approval ratio that satisfies the election success, such as 1/2) for signature verification. During the verification process, the system will use the public key of all signatures (including the public key of the smart contract) and the signature as parameters, call the signature verification algorithm, verify the validity of the signature, and compare the approval ratio with the preset ratio. If it is greater than or equal to the preset ratio, the output opinion is in favor, otherwise, it is against; finally, the verification results and opinions are fed back to each class member. The head teacher decides whether Zhang San will become the head of the squad based on the opinions obtained.

To sum up, the ring signature method based on the smart contract in the above-mentioned embodiments of the present invention encrypts the data of the initial random number according to the public key of the participant, and sends the ciphertext of the random number obtained by encrypting the data to the corresponding participant, so that the Let the participants decrypt the random number ciphertext according to their own private keys to obtain the original random number, and combine their own opinions to process the original random number to obtain the target random number, so that the smart contract can obtain the overall opinion of each participant, and then the obtained random number is obtained. The overall opinion of the network is ring signed, and the research on the collective ring signature scene is realized, so that only one ring signature can complete the collection of participants' opinions, so that the ring signature has nothing to do with the number of participants, and realizes the rapid response of transaction data. The efficiency of signing is improved. Further, according to the public key of the participant, the public and private key pair of the implementer, and the approval ratio, the ring signature is performed and the signature result is generated. After optimizing the outside of the ring signature, it is added to the existing ring signature scheme. , making the optimized scheme portable for ring signatures, further improving the performance of ring signatures, and solving the ring signature scheme in the prior art, when faced with application scenarios that require a large number of signatures, it cannot achieve high-frequency transaction data. Quick response to technical issues that lead to inefficient signatures.

Embodiment 3

Please refer to FIG. 8 , which shows a ring signature system based on a smart contract in a third embodiment of the present invention. The system includes:

The acquisition module is used to acquire the public keys of all participants and generate multiple groups of initial random numbers corresponding to the number of participants;

The data processing module is used for performing data encryption on the initial random number according to the public key of the participant, and sending the ciphertext of the random number obtained by the data encryption to the corresponding participant, so that the participant can decrypt the random number according to the private key of the participant. The original random number is obtained by counting the ciphertext, and the original random number is obtained by data processing in combination with its own opinions;

The signature module is used to calculate the target random number combined with the number of participants to obtain the approval ratio, and randomly generate a public-private key pair of the implementer according to the key generation algorithm, and combine the public-private key pair of the implementer according to the public key of the participant , and the approval ratio to perform ring signature and generate a signature result.

In some optional embodiments, the data processing module includes:

a first execution unit, for adding 1 to the initial random number when it is approved;

The second execution unit is used to keep the initial random number unchanged when objecting or abstaining.

In some optional embodiments, the signature module includes:

A verification module, configured to obtain the signature result and distribute the signature result to each participant, and perform signature verification on the signature result in combination with a preset ratio.

In some optional embodiments, the verification module includes:

a first judgment unit, performing signature verification on the signature result in combination with a preset ratio, and judging whether the signature result is valid;

The third execution unit is used to display that the verification result is invalid when the signature is invalid;

a fourth execution unit, configured to compare the preset ratio with the approval ratio when the signature is valid, and determine whether the approval ratio is greater than the preset ratio;

a first execution sub-unit, configured to generate a final overall signature opinion as approval when the approval ratio is greater than the preset ratio;

The second execution sub-unit is configured to generate the final overall signature opinion as disapproval when the approval ratio is not greater than the preset ratio.

In some optional embodiments, the signature module includes:

The uploading module is used to upload the target random number to the blockchain without encryption.

In some optional embodiments, the signature module includes:

a number of likes calculation unit, used to calculate the difference between the target random number and the initial random number to obtain the number of likes;

The approval ratio calculation unit is used to obtain the approval ratio according to the approval number combined with the number of participants.

To sum up, the ring signature system based on the smart contract in the above-mentioned embodiments of the present invention encrypts the data of the initial random number according to the public key of the participant, and sends the ciphertext of the random number obtained by encrypting the data to the corresponding participant, so that the Let the participants decrypt the random number ciphertext according to their own private keys to obtain the original random number, and combine their own opinions to process the original random number to obtain the target random number, so that the smart contract can obtain the overall opinion of each participant, and then the obtained random number is obtained. The overall opinion of the network is ring signed, and the research on the collective ring signature scene is realized, so that only one ring signature can complete the collection of participants' opinions, so that the ring signature has nothing to do with the number of participants, and realizes the rapid response of transaction data. The efficiency of signing is improved. Further, according to the public key of the participant, the public and private key pair of the implementer, and the approval ratio, the ring signature is performed and the signature result is generated. After optimizing the outside of the ring signature, it is added to the existing ring signature scheme. , making the optimized scheme portable for ring signatures, further improving the performance of ring signatures, and solving the ring signature scheme in the prior art, when faced with application scenarios that require a large number of signatures, it cannot achieve high-frequency transaction data. Quick response to technical issues that lead to inefficient signatures.

In addition, an embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, implements the steps of the method in the foregoing embodiment.

In addition, an embodiment of the present invention also provides a data processing device, including a memory, a processor, and a computer program stored in the memory and running on the processor, and the processor implements the steps of the methods in the above embodiments when the processor executes the program.

The logic and/or steps represented in flowcharts or otherwise described herein, for example, may be considered an ordered listing of executable instructions for implementing the logical functions, may be embodied in any computer-readable medium, For use with, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from and execute instructions from an instruction execution system, apparatus, or apparatus) or equipment. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport the program for use by or in connection with an instruction execution system, apparatus, or apparatus.

More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections with one or more wiring (electronic devices), portable computer disk cartridges (magnetic devices), random access memory (RAM), Read Only Memory (ROM), Erasable Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program may be printed, as may be done, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or other suitable means as necessary process to obtain the program electronically and then store it in computer memory.

It should be understood that various parts of the present invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or a combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, Programmable Gate Arrays (PGA), Field Programmable Gate Arrays (FPGA), etc.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. a ring signature method based on smart contract, is characterized in that, described method comprises: Obtain the public keys of all participants, and generate multiple sets of initial random numbers corresponding to the number of participants; Perform data encryption on the initial random number according to the public key of the participant, and send the ciphertext of the random number obtained by the data encryption to the corresponding participant, so that the participant can decrypt the ciphertext of the random number according to his own private key to obtain a random number The original text, and combined with their own opinions, perform data processing on the original random number to obtain the target random number; Calculate the target random number combined with the number of participants to obtain the approval ratio, and randomly generate a public-private key pair of the implementer according to the key generation algorithm, and combine the public-private key pair of the implementer and the approval according to the public key of the participant. Proportionally perform ring signatures and generate signature results; Wherein, in the step of performing data processing on the original text of the random number to obtain the target random number in combination with one's own opinions, the data processing method includes: According to their own opinions, the random number will be increased by one if they are in favor. If they are opposed or abstained, the random number will remain unchanged. Finally, the processed random number will be sent to the smart contract; the smart contract will collect the random number processed by all participants. After counting, it will be calculated according to the calculation formula to obtain the overall opinion of the participants, so as to obtain the target random number; Among them, the calculation formula is as follows: v=N’-N In the formula, v is the number of people who agree, N' is the sum of the random numbers processed by all participants, and N is the sum of the generated random numbers. 2. The ring signature method based on a smart contract according to claim 1, wherein, in the step of performing data processing on the original text of the random number in combination with one's own opinion to obtain a target random number, the data processing comprises: If yes, add 1 to the initial random number; In the event of objection or abstention, the initial random number remains unchanged. 3. The ring signature method based on a smart contract according to claim 1, wherein the ring signature is performed according to the public key of the participant in combination with the public-private key pair of the implementer and the approval ratio, and a signature result is generated. The steps include: Obtain the signature result and distribute the signature result to each participant, and perform signature verification on the signature result in combination with a preset ratio. 4. The ring signature method based on a smart contract according to claim 3, wherein the step of performing signature verification on the signature result in combination with a preset ratio comprises: Perform signature verification on the signature result in combination with a preset ratio, and determine whether the signature result is valid; If the signature is invalid, the verification result is displayed as invalid; If the signature is valid, comparing the preset ratio with the approval ratio to determine whether the approval ratio is greater than the preset ratio; If so, the final overall signature opinion generated is in favor; If not, the final overall signature opinion generated is against. 5. The smart contract-based ring signature method according to claim 1, wherein the step of obtaining the approval ratio by calculating the target random number in combination with the number of participants comprises: The target random number is uploaded to the blockchain without encryption. 6. The smart contract-based ring signature method according to claim 1, wherein the step of obtaining the approval ratio by calculating the target random number in combination with the number of participants comprises: calculating the difference between the target random number and the initial random number to obtain the number of approvals; The approval ratio is obtained according to the number of approvals combined with the number of participants. 7. The smart contract-based ring signature method according to claim 1, wherein the target random number only displays the overall opinion of all participants, and does not involve detailed opinion information of each participant. 8. A ring signature system based on a smart contract, wherein the system comprises: The acquisition module is used to acquire the public keys of all participants and generate multiple sets of initial random numbers corresponding to the number of participants; The data processing module is used to encrypt the data of the initial random number according to the public key of the participant, and send the random number ciphertext obtained by the data encryption to the corresponding participant, so that the participant can decrypt the random number according to the private key of the participant. The original random number is obtained by counting the ciphertext, and the target random number is obtained by performing data processing on the original text of the random number in combination with one's own opinions; The signature module is used to calculate the target random number combined with the number of participants to obtain the approval ratio, and randomly generate a public-private key pair of the implementer according to the key generation algorithm, and combine the public-private key pair of the implementer according to the public key of the participant , and the approval ratio performs ring signature and generates a signature result; Wherein, in the data processing module, the data processing method includes: According to their own opinions, the random number will be increased by one if they are in favor. If they are opposed or abstained, the random number will remain unchanged. Finally, the processed random number will be sent to the smart contract; the smart contract will collect the random number processed by all participants. After counting, it will be calculated according to the calculation formula to obtain the overall opinion of the participants, so as to obtain the target random number; Among them, the calculation formula is as follows: v=N’-N In the formula, v is the number of people who agree, N' is the sum of the random numbers processed by all participants, and N is the sum of the generated random numbers. 9 . A computer-readable storage medium on which a computer program is stored, characterized in that, when the program is executed by a processor, the smart contract-based ring signature method according to any one of claims 1 to 7 is implemented. 10. A data processing device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, when the processor executes the program, any one of claims 1-7 is implemented. A described smart contract-based ring signature method.

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