Abstract
In proxy signature schemes, the proxy signer B is permitted to produce a signature on behalf of the original signer A. However, exposure of proxy signing keys can be the most devastating attack on a proxy signature scheme since any adversary can sign messages on behalf of the proxy signer. In this paper, we applied Dodis, et al.’s key-insulation mechanism and proposed an Identity-Based (ID-based) Key-Insulated Proxy Signature (IBKIPS) scheme with secure key-updates. The proposed scheme is strong key-insulated and perfectly key-insulated. Our scheme also supports unbounded period numbers and random-access key-updates.
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Supported by the National Natural Science Foundation of China (No. 60573032, 60773092, 90604036, 60873229, 60903178, 60672072, 60832003) and Zhejiang Provincial Natural Science Foundation of China (No. Y106505).
Communication author: Wan Zhongmei, born in 1973, female, Lecturer.
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Wan, Z., Lai, X., Weng, J. et al. Identity-based key-insulated proxy signature. J. Electron.(China) 26, 853–858 (2009). https://doi.org/10.1007/s11767-008-0128-2
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DOI: https://doi.org/10.1007/s11767-008-0128-2