[Resource Topic] 2021/1483: A Practical Forward-Secure DualRing

Welcome to the resource topic for 2021/1483

A Practical Forward-Secure DualRing

Authors: Nan Li, Yingjiu Li, Atsuko Miyaji, Yangguang Tian, Tsz Hon Yuen


Ring signature allows a signer to generate a signature on behalf of a set of public keys, while a verifier can verify the signature without identifying who the actual signer is. In Crypto 2021, Yuen et al. proposed a new type of ring signature scheme called DualRing. However, it lacks forward security. The security of DualRing cannot be guaranteed if the signer’s secret key is compromised. In this work, we introduce forward-secure DualRing. The singer can periodically update his secret key using our proposed ``split-and-combine" method to mitigate the security risks caused by the leakage of secret keys. We present a practical scheme based on the discrete logarithm assumption. We show a detailed evaluation to validate its practicality.

ePrint: https://eprint.iacr.org/2021/1483

See all topics related to this paper.

Feel free to post resources that are related to this paper below.

Example resources include: implementations, explanation materials, talks, slides, links to previous discussions on other websites.

For more information, see the rules for Resource Topics .