A Signcryption Scheme with Signature Directly Verifiable by Public Key
Feng Bao,Robert H. Deng +1 more
- pp 55-59
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Zheng's scheme is modified so that the recipient's private key is no longer needed in signature verification, and the computational cost is higher than that of Zheng's scheme but lower than that that of the signature-then-encryption approach.Abstract:
Signcryption, first proposed by Zheng [4, 5], is a cryptographic primitive which combines both the functions of digital signature and public key encryption in a logical single step, and with a computational cost siginficantly lower than that needed by the traditional signature-then-encryption approach. In Zheng's scheme, the signature verification can be done either by the recipient directly (using his private key) or by engaging a zero-knowledge interative protocol with a third party, without disclosing recipient's private key. In this note, we modify Zheng's scheme so that the recipient's private key is no longer needed in signature verification. The computational cost of the modified scheme is higher than that of Zheng's scheme but lower than that of the signature-then-encryption approach.read more
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References
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Journal ArticleDOI
A public key cryptosystem and a signature scheme based on discrete logarithms
TL;DR: A new signature scheme is proposed, together with an implementation of the Diffie-Hellman key distribution scheme that achieves a public key cryptosystem that relies on the difficulty of computing discrete logarithms over finite fields.
Book ChapterDOI
A Public Key Cryptosystem and a Signature Scheme Based on Discrete Logarithms
TL;DR: In this article, a new signature scheme is proposed together with an implementation of the Diffie-Hellman key distribution scheme that achieves a public key cryptosystem and the security of both systems relies on the difficulty of computing discrete logarithms over finite fields.
Book ChapterDOI
Efficient Identification and Signatures for Smart Cards
TL;DR: An efficient interactive identification scheme and a related signature scheme that are based on discrete logarithms and which are particularly suited for smart cards are presented.
Book ChapterDOI
Digital Signcryption or How to Achieve Cost(Signature & Encryption) << Cost(Signature) + Cost(Encryption)
TL;DR: Signcryption as discussed by the authors is a new cryptographic primitive which simultaneously fulfills both the functions of digital signature and public key encryption in a logically single step, and with a cost significantly lower than that required by signature-then-encryption.
Journal ArticleDOI
Cryptanalysis and improvement of signcryption schemes
H. Petersen,M. Michels +1 more
TL;DR: In this paper, a serious problem with two new schemes for authenticated encryption, called signcryption, are pointed out and a solution is outlined that helps to overcome the problem.