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Data sharing system and method based on proxy re-encryption

A technology of proxy re-encryption and data sharing, applied in the field of data sharing system based on proxy re-encryption, can solve problems such as large communication cost, and achieve the effect of reducing communication cost, high security and efficiency

Active Publication Date: 2021-08-06
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this process, the data owner needs to re-download, re-encrypt, and re-upload the data, which will cause a huge communication cost

Method used

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  • Data sharing system and method based on proxy re-encryption
  • Data sharing system and method based on proxy re-encryption
  • Data sharing system and method based on proxy re-encryption

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0044] First the definitions of some letters and formulas involved in the present invention are illustrated:

[0045] {sk Alice ,pk Alice}: The public-private key pair of the data owner, where pk Alice =sk Alice G; sk Alice is the private key of the data owner, pk Alice is the public key of the data owner.

[0046] {sk Bob ,pk Bob}: public-private key pair of the data requester, where pk Bob =sk Bob G; sk Bob is the private key of the data requester, pk ...

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Abstract

The invention discloses a data sharing system and method based on proxy re-encryption. The system comprises a data owner terminal, a data proxy terminal and a data requester terminal. The data requester terminal initiates a data transmission request, the data owner terminal generates an agency key and then sends the agency key to the data agency terminal, the agency terminal re-encrypts a first ciphertext to generate a second ciphertext which can be decrypted by the key of the data requester, and then the second ciphertext is transmitted to the data requester terminal, And the data requester terminal performs decryption to obtain a plaintext, and the encryption algorithm is constructed based on a national cryptographic algorithm. By implementing the embodiment of the invention, the data owner terminal does not need to re-download, re-encrypt and then upload the uploaded to-be-shared data, so that the communication cost in the data transmission process is greatly reduced, and in addition, the cryptographic algorithm is based on the ECC elliptic curve cryptographic theory, and has higher security and efficiency.

Description

technical field [0001] The invention relates to the technical field of data transmission, in particular to a data sharing system and method based on proxy re-encryption. Background technique [0002] With the rapid development of information technology, the exchange of information between different regions is gradually increasing, and the cyberspace with the Internet as the main carrier and the physical world are constantly intersecting and merging, giving rise to massive "human-machine-thing" data. As data is a new factor of production, how to effectively use these big data to generate social value and economic value is the key. In order to take advantage of the advantages brought by big data, it is first necessary to break the "data island" dilemma of "everyone has data, but everyone lacks data" and allow data to circulate. Data sharing is an important basis for realizing data circulation and data industrialization development. It can not only reduce the cost of data coll...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L9/06H04L9/14H04L9/30G06F16/176
CPCH04L63/0428H04L63/0478H04L9/0643H04L9/14H04L9/3066G06F16/176
Inventor 翁健王志宏李勇标李明黎定成
Owner JINAN UNIVERSITY
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