Paper 2016/345

Provably Secure Password Reset Protocol: Model, Definition, and Generic Construction

Satsuya Ohata, Takahiro Matsuda, and Kanta Matsuura


Many online services adopt a password-based user authentication system because of its usability. However, several problems have been pointed out on it, and one of the well-known problems is that a user forgets his/her password and cannot login the services. To solve this problem, most online services support a mechanism with which a user can reset a password. In this paper, we consider a provable security treatment for a password reset protocol. We formalize a model and security definitions, propose a generic construction based on a pseudorandom function and public key encryption. In addition, we implement a prototype of our protocol to evaluate its efficiency.

Available format(s)
Cryptographic protocols
Publication info
Preprint. MINOR revision.
Password Reset ProtocolProvable Security
Contact author(s)
satsuya @ iis u-tokyo ac jp
2016-04-01: received
Short URL
Creative Commons Attribution


      author = {Satsuya Ohata and Takahiro Matsuda and Kanta Matsuura},
      title = {Provably Secure Password Reset Protocol: Model, Definition, and Generic Construction},
      howpublished = {Cryptology ePrint Archive, Paper 2016/345},
      year = {2016},
      note = {\url{}},
      url = {}
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