Threshold- Based Pairing-free Conditional Anonymous Proxy Re-Encryption Scheme

Zhaobin LI; Hong ZHAO; Zhanzhen WEI

doi:10.11999/JEIT200946

Volume 43 Issue 11

Nov. 2021

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Zhaobin LI, Hong ZHAO, Zhanzhen WEI. Threshold- Based Pairing-free Conditional Anonymous Proxy Re-Encryption Scheme[J]. Journal of Electronics & Information Technology, 2021, 43(11): 3350-3358. doi: 10.11999/JEIT200946

Citation:

Zhaobin LI, Hong ZHAO, Zhanzhen WEI. Threshold- Based Pairing-free Conditional Anonymous Proxy Re-Encryption Scheme[J]. Journal of Electronics & Information Technology, 2021, 43(11): 3350-3358. doi: 10.11999/JEIT200946

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Threshold- Based Pairing-free Conditional Anonymous Proxy Re-Encryption Scheme

doi: 10.11999/JEIT200946

Beijing Electronic Science and Technology Institute, Beijing 100070, China

Funds: The National Key Research and Development Project (2017YFB0802705)

Received Date: 2020-11-05
Rev Recd Date: 2021-03-18

Available Online: 2021-04-20

Publish Date: 2021-11-23

Abstract

Abstract

Conditional Proxy Re-Encryption (CPRE) can grant fine-grained authorization to the original ciphertext according to the conditions. The existing CPRE schemes only check the conditions of the original ciphertext, but ignore the conditions of the re-encryption key. No effective measures are taken to protect the conditions in these CPRE schemes, which may lead to privacy disclosure of conditions. A Threshold-Based Conditional Anonymous Proxy Re-Encryption scheme (TB-CAPRE) is constructed, which can not only verify the conditions of ciphertext and re-encryption key at the same time, but also make sensitive conditional information anonymous. The re-encryption processes are completed by multiple agent nodes, so TB-CAPRE can resist the collusion attacks. The theoretical analysis proves that the new scheme is INDistinguishable against adaptive Chosen-Ciphertext Attack(simply donoted by IND-CCA) in the random oracle. The analysis of performance and computation shows that TB-CAPRE does not introduce excessive overhead while increasing security and related functions. It is possible that TB-CAPRE is applied to distributed environment.
- Conditional Proxy Re-Encryption (CPRE),
- Threshold,
- Conditional anonymous,
- Pairing-free

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References(26)

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