Non-interactive Cryptosystem for Entity Authentication

In case of mobile agent based computing system such as agent-based electronic payment and online electronic publishing of multimedia contents, both precise identification and secure authentication schemes are required for its security. The public-key cryptosystem and the digital signature scheme have been the foundation of overall secure systems. The requirement for providing agent based secure digital contents in electronic commerce is to implement the compatible secure entity authentication scheme. In this paper, existing discrete logarithm based Schnorr like authentication schemes are improved by the analysis of performance and security on the interactive protocols. And ElGamal type authentication schemes are also proposed. Then, they are enhanced with oblivious transfer based non-interactive public key cryptosystem for entity authentication. Proposed non-interactive protocols are applicable to the noninteractive zero knowledge proofs and they can provide compatible performance and safety in distributed commerce applications such as copyright protection system on multimedia contents.

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