Towards attack resilient social network based threshold signing

Authors:
Jian Zhou;Ji Xiang;Neng Gao
Affiliations:
The State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, China;The State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, China;The State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, China
Venue:
Inscrypt'11 Proceedings of the 7th international conference on Information Security and Cryptology
Year:
2011

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Abstract

The idea exploiting social networks for threshold signing was proposed to help average users better protect their private keys. In order to investigate the attack-resilience of the whole system, we propose a weight based attack strategy, which is more powerful than those previously proposed. We also investigate some important factors affecting the attack-resilience of the system, and based on the results, we propose a new design for delegate selection which can efficiently improve the attack-resilience of the whole system.