2004•Journal of Xi'an University of Post and TelecommunicationsRequires access

A modified group-oriented cryptosystem

Xiaoying Zhao

Abstract

With self-certified public key cryptographic approach,Saeednia and Ghodosi presented a group-oriented(t,n)cryptosystem(S-G cryptosystem).However,this cryptosystem cannot withstand conspiracy attacks.Therefore,Ghodosi and Saeednia proposed a modified version for the cryptostem.But,in fact,there are some security flaws in that improved cryptosystem.In this paper,a novel modified cryptosystem is presented for the S-G cryptosystem.This new cryptosystem has an easy implementation with an ideal overhead of computation and communication.

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Available abstract

Key concepts: Cryptosystem, Hybrid cryptosystem, Goldwasser–Micali cryptosystem, Paillier cryptosystem, Threshold cryptosystem, Computer science, Cryptography, Plaintext-aware encryption