Towards Formal Verification of Password Generation Algorithms used in Password Managers

06/07/2021 ∙ by Miguel Grilo, et al. ∙ 0

Password managers are important tools that enable us to use stronger passwords, freeing us from the cognitive burden of remembering them. Despite this, there are still many users who do not fully trust password managers. In this paper, we focus on a feature that most password managers offer that might impact the user's trust, which is the process of generating a random password. We survey which algorithms are most commonly used and we propose a solution for a formally verified reference implementation of a password generation algorithm. We use EasyCrypt as our framework to both specify the reference implementation and to prove its functional correctness and security.

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