A multi-agent data sharing method based on blockchain storage
A data sharing, multi-agent technology, applied in the field of information security, can solve the problems of difficulty, low efficiency, huge amount of calculation, etc., to achieve the effect of improving efficiency and increasing flexibility
Active Publication Date: 2022-06-24
东北大学秦皇岛分校
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Among them, the calculation amount of the bilinear pairing scheme is very large, the efficiency is very low, and it is very difficult to apply it in practice; the bilinear pairing scheme has improved efficiency, but it cannot resist the agent and the user. collusion
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[0029] The invention will be further described below with reference to the accompanying drawings and specific implementation examples. The purpose of the present invention is to provide an efficient and safe data sharing scheme, under the premise of ensuring the data security of the owner, the number of times of encryption and decryption is reduced as much as possible, and the efficiency of the data sharing stage is improved. The present invention aims to propose a light-weight and efficient data sharing method for a 1-to-n sharing environment, which includes three user entities, which are the data owner, the proxy group, and the data requester. The data owner is responsible for Encrypt and block files, and upload them to the alliance chain and the cloud respectively; the proxy group is responsible for partially decrypting the file and sending it to all members of the data requester (partial decryption does not require all the proxies to participate, making the scheme more flex...
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The invention provides a multi-agent data sharing method based on block chain storage. First, the data owner encrypts the file, and then uploads part of the cipher text to the alliance chain where the agent group is located, and the data owner receives the data from the data requesting party. After sharing the request, first verify the identity of the member of the data requester. After the verification is passed, the proxy group performs the proxy re-encryption process to obtain the re-encrypted ciphertext, and then sends the re-encrypted ciphertext to the data requester. The data requester can do simple calculations Restore the requested file. In addition, the sharing request will be recorded on the block chain for verification in case of disputes; the present invention utilizes the ciphertext format and uses the Shamir secret sharing technology to effectively prevent the collusion phenomenon between the agent and the user, and adopts the identity authentication feature of the alliance chain to prevent In order for the agent group to obtain part of the ciphertext on the alliance chain, the sharing process is stored on the chain, and it can also be used as a certificate in case of disputes afterwards.
Description
technical field [0001] The invention relates to the technical field of information security, in particular to a multi-agent data sharing method based on blockchain storage. Background technique [0002] With the advent of the era of big data, data is growing explosively, and traditional data storage methods are challenged. In order to realize the storage of massive data, cloud storage technology emerges as the times require. Many users worry about whether cloud storage can effectively ensure data security while achieving convenience and speed. According to the survey, up to 70% of users are unwilling to store important data on cloud platforms due to information security considerations. In order to ensure the security of data, encryption technology is used in cloud storage, which eliminates the concerns of most users. However, the emergence of encrypted storage has also challenged data sharing. A large number of technologies have emerged to solve this problem, and proxy re-...
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IPC IPC(8): G06F21/60G06F21/62G06F21/64G06F21/31
CPCG06F21/602G06F21/6227G06F21/64G06F21/31
Inventor 史闻博张蕊常远鲁宁
Owner 东北大学秦皇岛分校