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InfoResearchPeer-reviewed
HP-OTP: One-Time Password Scheme Based on Hardened Password
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Summary
The paper proposes HP-OTP, a challenge-response one-time password scheme that hardens the password without changing existing password-OTP architectures. The server stores only a non-reversible verification credential, and the device's response combines the candidate password, the possession factor, and a random salt. The authors report that comprehensive evaluation shows HP-OTP is secure and efficient, with verification taking less than 5 milliseconds.