Cryptology ePrint Archive: Report 2010/359

Identity Based Self Delegated Signature - Self Proxy Signatures

S.Sharmila Deva Selvi and S.Sree Vivek and S.Gopinath and C.Pandu Rangan

Abstract: A proxy signature scheme is a variant of digital signature scheme in which a signer delegates his signing rights to another person called proxy signer, so that the proxy signer can generate the signature of the actual signer in his absence. Self Proxy Signature (SPS) is a type of proxy signature wherein, the original signer delegates the signing rights to himself (Self Delegation), there by generating temporary public and private key pairs for himself. Thus, in SPS the user can prevent the exposure of his private key from repeated use. In this paper, we propose the first identity based self proxy signature scheme. We give a generic scheme and a concrete instantiation in the identity based setting. We have defined the appropriate security model for the same and proved both the generic and identity based schemes in the defined security model.

Category / Keywords: public-key cryptography / Identity Based Cryptography, Self-Proxy Signatures, Delegation, Random Oracle Model.

Publication Info: Full version of the paper accepted in APWCS-2010

Date: received 21 Jun 2010

Contact author: sharmioshin at gmail com, ssreevivek@gmail com

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Version: 20100625:123701 (All versions of this report)

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