Verifiable Attribute-based Timed Signatures and Its Applications
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TP309

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This work is supported in part by National Natural Science Foundation of China (Grant Nos. U1536205, 61472084, 61972094 and 62032005), National Key Research and Development Program of China (Grant No. 2017YFB0802000), Shanghai Innovation Action Project under Grant No.16DZ1100200, Shanghai Science and Technology Development Funds under Grant No. 16JC1400801, Shandong Provincial Key Research and Development Program of China (Grant Nos. 2017CXGC0701 and 2018CXGC0701) and the young talent promotion project of Fujian Science and Technology Association.

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    Abstract:

    A verifiable timed signature (VTS) scheme allows one to time-lock a signature on a known message for a given amount of time T such that after performing a sequential computation for time T anyone can extract the signature from the time-lock. Verifiability ensures that anyone can publicly check if a time-lock contains a valid signature on the message without solving it first, and that the signature can be obtained by solving the same for time T. This study first proposes the notion of verifiable attribute-based timed signatures (VABTS) and gives an instantiation VABTS further. The instantiation VABTS scheme can not only simultaneously support identity privacy-preserving, dynamic user revocation, traceability, timing, but also solve the problem of key escrow in attribute-based scheme. In addition, VABTS has many applications. This study lists two application scenarios of VABTS: building a privacy-preserving payment channel network for the permissioned blockchain and realizing a fair privacy-preserving multi-party computing. Finally, it is proved that the instantiation VABTS scheme is secure and efficient via formal security analysis and performance evaluation.

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侯慧莹,宁建廷,黄欣沂,赵运磊.可验证的属性基定时签名方案及其应用.软件学报,2023,34(5):2465-2481

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History
  • Received:April 14,2021
  • Revised:May 22,2021
  • Adopted:
  • Online: September 16,2022
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