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Password-Based Key Agreement Protocol

Keywords: Password , verifier , key agreement protocol , password guessing attack , stolen-verifier attack

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Abstract:

In this study, we will review Kim et al.’s protocol and Lee et al.’s protocol respectively and show that their protocols are not secure as they have claimed. Then, we firstly present our improved password-based key agreement protocol based on Kim et al.’s scheme and show that it withstands password guessing attack and illegal modification. Then we propose an improved Verifier-based key agreement protocol based on Lee et al.’s scheme and demonstrate that it is secure against Stolen-verifier attack and password guessing attack.

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