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Efficient Certificateless Proxy Signature Scheme with Provable Security
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- Authors
- Seung-Hyun Seo, Kyu Young Choi, Jung Yeon Hwang, Seungjoo Kim
- Issue Date
- 2012-04
- Citation
- Information Sciences, v.188, pp.322-337
- ISSN
- 0020-0255
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Project Code
- 11ZS1100, Development of Embedded System for Intelligent Vehicle, Hwang Seung Ku
- Abstract
- In this paper we propose a very efficient and provably secure proxy signature scheme with implicit certificate (called "certificateless proxy signature scheme"), where a receiver does not have to verify a certificate before verifying a signed message, yet only the original signer or the proxy signer who properly registered its public key and identity information is able to sign. Unlike traditional approaches which assume a PKI where the original signer and the proxy signer already hold their public keys and digital certificates, our scheme does not need for each user to have a public key and a certificate, thus we can save the time for verifying the original signer's and the proxy signer's certificates in the proxy signature verification phase. Furthermore, we present a formal security model for our scheme under the intractability of the computational Diffie-Hellman problem in the random oracle model. © 2011 Elsevier Inc. All rights reserved.
- KSP Keywords
- Certificateless proxy signature, Digital Certificate, Provable Security, Provably secure, Public Key, Security model, Signature Verification, Signature scheme, computational diffie-hellman problem(CDHP), formal security, implicit certificate