On the Security of a Certificateless Public-Key Encryption

Zhenfeng Zhang; Dengguo Feng

Paper 2005/426

On the Security of a Certificateless Public-Key Encryption

Zhenfeng Zhang and Dengguo Feng

Abstract

Certificateless public-key cryptosystem is a recently proposed attractive paradigm using public key cryptosystem, which avoids the key escrow inherent in identity-based public-key cryptosystems, and does not need certificates to generate trust in public keys. In 2005, Al-Riyami and Paterson proposed a new certificateless public-key encryption scheme and proved its security in the random oracle model. This paper shows that their scheme is vulnerable to adaptive chosen ciphertext attacks, and presents a countermeasure to overcome such a security flaw.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Keywords: certificateless public key encryption cryptanalysis
Contact author(s): zfzhang @ is iscas ac cn
History: 2005-11-23: received
Short URL: https://ia.cr/2005/426
License: CC BY

BibTeX

@misc{cryptoeprint:2005/426,
      author = {Zhenfeng Zhang and Dengguo Feng},
      title = {On the Security of a Certificateless Public-Key Encryption},
      howpublished = {Cryptology {ePrint} Archive, Paper 2005/426},
      year = {2005},
      url = {https://eprint.iacr.org/2005/426}
}