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Nova scientia
versão On-line ISSN 2007-0705
Resumo
MARTINEZ PELAEZ, Rafael; SAAVEDRA BENITEZ, Yesica; VELARDE ALVARADO, Pablo e POMYKALA, Jacek. Dynamic ID-based remote user authentication scheme using ElGamal encryption system. Nova scientia [online]. 2016, vol.8, n.17, pp.263-277. ISSN 2007-0705.
We propose a new dynamic ID-based remote user authentication scheme using smart cards, which it is based on one-way hash function, ElGamal’s public key cryptosystem and nonce. The scheme achieves the following security requirements: 1) users can choose and change their password freely, 2) mutual authentication between the user and the server, 3) the user and the server establish a session key after successful authentication process, 4) the server does not maintain a verification table, 5) the login request message does not contain the user’s identity, and 6) the authentication phase does not require time-synchronization, making it more secure than previous schemes. In order to verify the security characteristics of our protocol, we have modelled and analysed the proposal using High-level Protocol Specification Language (HLPSL) and Automated Validation of Internet Security Protocols and Applications (AVISPA) tool. The results demonstrate that our protocol achieves more security requirements than previous works.
Palavras-chave : cryptography; computer network; discrete logarithm; mutul authentication; password; smart cards; AVISPA tool.