Abstract
In the e-commerce scenario, the signature schemes generally have to meet four requirements: public verification, integrity, traceable and efficiency. To achieve the above goals, the paper proposes a identity-based threshold group signature scheme which can not only simplify the process of key management, but also allow to trace the user identities. To protect the user privacy, the scheme blinds the user identities and stores them on the blockchain to prevent the malicious members from tampering with the content. Security analysis shows that the proposed signature, whose difficulty is equivalent to solve the discrete logarithm problem, achieves a high level of anonymity and can resist impersonation attacks. Computational complexity analysis shows that the new method with low computation overhead and high communication efficiency can be effectively adapted to the electronic commerce scene.
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This work was supported by Henan Province Higher Education Key Research Project (20B520040).
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Wang, L. et al. (2020). Identity-Based Threshold Group Signature Scheme of Blockchain Verification. In: Han, W., Zhu, L., Yan, F. (eds) Trusted Computing and Information Security. CTCIS 2019. Communications in Computer and Information Science, vol 1149. Springer, Singapore. https://doi.org/10.1007/978-981-15-3418-8_11
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DOI: https://doi.org/10.1007/978-981-15-3418-8_11
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