Abstract
With the development of blockchain technology, there is an increasing call for privacy protection and supervision of blockchain transactions. We propose a novel privacy protection scheme for group signature. Firstly, we design a revocation algorithm based on hierarchical time tree, that can shorten the size of validity period and support the discontinuity of member time period. Secondly, we provide an anonymous certificate to protect the privacy of group members’ identity. Thanks to the combination of signature scheme and blockchain, our scheme can guarantee that the identity of any user will not be revealed during the whole process. Moreover, with the features of group signature, we can also enable the tracking and revocation of risky transactions and provide security for on-chain data. Finally, our experimental evaluation of elliptic curves based on BN-382 bit prime proves that our scheme is feasible and efficient.
This work was supported by the National Natural Science Foundation of China Youth Fund (12201185), Henan Province Key R &D and Promotion Special Project (232102210192) and the Key Scientific Research Projects of Henan Provincial Colleges and Universities (23A520035).
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Wang, D., Zhu, B., Li, X., Zheng, A., Liu, Y. (2023). A Novel Group Signature Scheme with Time-Bound Keys for Blockchain. In: Yuan, L., Yang, S., Li, R., Kanoulas, E., Zhao, X. (eds) Web Information Systems and Applications. WISA 2023. Lecture Notes in Computer Science, vol 14094. Springer, Singapore. https://doi.org/10.1007/978-981-99-6222-8_42
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