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一种可验证的 $ (k,n) $门限多秘密共享方案

A verifiable $ (k,n) $ threshold multi-secret sharing scheme

期刊信息

合肥工业大学(自然科学版),2025年4月,第48卷第4期:544-548

DOI: 10.3969/j.issn.1003-5060.2025.04.018

作者信息

张宏图,胡航,李富林

(合肥工业大学数学学院,安徽合肥230601)

摘要和关键词

摘要: 基于排列和 Diffie-Hellman 问题,文章提出一种可验证的 $ (k, n) $ 门限多秘密共享方案。该方案中排列的使用确保了计算生成的秘密份额的安全性,在 Diffie-Hellman 问题的假设下,各参与者的伪份额均由自己生成,基于相关等式是否成立实现了方案的可验证性。各参与者只需维护 1 个彼此不同的伪份额即可根据门限值 k 进行多个秘密的重构。结果表明,该方案不需要安全信道,各参与者的伪份额可重复使用,且可以抵抗合谋攻击和外部攻击。

关键词: 多秘密共享;门限恢复;可验证性;排列;Diffie-Hellman问题

Authors

ZHANG Hongtu, HU Hang, LI Fulin

(School of Mathematics, Hefei University of Technology, Hefei 230601, China)

Abstract and Keywords

Abstract: Based on the permutation and Diffie-Hellman problem, a verifiable $ (k,n) $ threshold multi-secret sharing scheme is proposed. In the scheme, the application of the permutation ensures the security of the secret shares generated by calculation. Under the assumption of the Diffie-Hellman problem, participants' pseudo-shares are generated by themselves. The verifiability of the scheme is achieved based on whether the relevant equation holds. Each participant only needs to maintain a pseudo-share that is different from each other to reconstruct multiple secrets according to the threshold value k. Further analysis shows that the scheme does not need a secure channel, the pseudo-share of each participant can be reused, and it can resist collusion and external attacks.

Keywords: multi-secret sharing; threshold recovery; verifiability; permutation; Diffie-Hellman problem

基金信息

国家自然科学基金资助项目(12171134);国家自然科学基金联合基金资助项目(U21A20428)

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