Abstract
In proxy signature schemes, an original signer A delegates its signing capability to a proxy signer B, in such a way that B can sign message on behalf of A. The recipient of the final message verifies at the same time that B computes the signature and that A has delegated its signing capability to B. Recently many identity-based (ID-based) proxy signature schemes have been proposed, however, the problem of key escrow is inherent in this setting. Certificateless cryptography can overcome the key escrow problem. In this paper, we present a general security model for certificateless proxy signature scheme. Then, we give a method to construct a secure certificateless proxy scheme from a secure certificateless signature scheme, and prove that the security of the construction can be reduced to the security of the original certificateless signature scheme.
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Foundation item: the National Natural Science Foundation of China (Nos. 60573032, 60773092, 90604036, 90704004)
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Wan, Zm., Lai, Xj., Weng, J. et al. On constructing certificateless proxy signature from certificateless signature. J. Shanghai Jiaotong Univ. (Sci.) 13, 692–694 (2008). https://doi.org/10.1007/s12204-008-0692-5
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DOI: https://doi.org/10.1007/s12204-008-0692-5