On the Existence of Short Certificateless Signatures

Kyung-Ah Shim ； Young-Ran Lee

《網際網路技術學刊》 11卷6期 (2010/11) Pp. 847-852

https://doi.org/10.6138/JIT.2010.11.6.12

並列摘要

Certificateless cryptography eliminates the need of certificates in public key cryptosystems and solves the inherent key escrow problem in identity-based cryptosystems. In this paper we discuss the existence of short certificateless signature schemes provably secure in formal security models recently established, whose resulting signature consists of a single element of the underlying group by demonstrating key replacement attacks on Du-Wen's and Tso et al.'s short certificateless signature schemes.

並列關鍵字

Public key infrastructure ； Digital signature ； Short signature ； Identity-based cryptography ； Certificateless signature ； Key replacement attack