A PKI system for detecting the exposure of a user’s secret key

Authors:
Younggyo Lee;Jeonghee Ahn;Seungjoo Kim;Dongho Won
Affiliations:
Information Security Group, Sungkyunkwan University, Korea;Department of Computer Science, Doowon Technical College, Korea;Information Security Group, Sungkyunkwan University, Korea;Information Security Group, Sungkyunkwan University, Korea
Venue:
EuroPKI 2006 Proceedings of the Third European conference on Public Key Infrastructure: theory and Practice
Year:
2006

Citing 3
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Abstract

Dodis et al proposed a key-insulated signature scheme in 2003. The scheme can minimize the damage caused by the secret key’s exposure but can not protect the user from the secret key’s exposure perfectly. We propose a PKI system which can detect immediately even a single illegitimate signature due to the exposure of a user’s secret key. The system uses the one-time hash chain based on NOVOMODO and can prevent the users from compromising the secret key more perfectly and effectively than the key-insulated signature scheme.