Security flaw in simple generalized group-oriented cryptosystem using ElGamal cryptosystem

Chuan Ming Li; Tzonelih Hwang; Narn Yih Lee

Security flaw in simple generalized group-oriented cryptosystem using ElGamal cryptosystem

Chuan Ming Li, Tzonelih Hwang, Narn Yih Lee

Research output: Contribution to journal › Article › peer-review

Abstract

A generalized group-oriented cryptosystem (GGOC) based on ElGamal cryptosystem was proposed by Yang et al. in 2003. This study shows that if the authorized decryption sets of users are not properly predetermined in Yang et al.'s GGOC, an unauthorized decryption set of users can recover the encrypted message without difficulty. This study also presents an improved protocol to resist such an attack.

Original language	English
Pages (from-to)	61-66
Number of pages	6
Journal	Informatica
Volume	18
Issue number	1
Publication status	Published - 2007 Jan 1

All Science Journal Classification (ASJC) codes

Information Systems
Applied Mathematics

Cite this

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abstract = "A generalized group-oriented cryptosystem (GGOC) based on ElGamal cryptosystem was proposed by Yang et al. in 2003. This study shows that if the authorized decryption sets of users are not properly predetermined in Yang et al.'s GGOC, an unauthorized decryption set of users can recover the encrypted message without difficulty. This study also presents an improved protocol to resist such an attack.",

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Security flaw in simple generalized group-oriented cryptosystem using ElGamal cryptosystem

Abstract

All Science Journal Classification (ASJC) codes

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