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One-Time Passwords (OTP) can provide complete protection of the login-time authentication mechanism against replay attacks. In this paper, we propose TSOTP: a new effective simple OTP method that generates a unique passcode for each use. The calculation uses both time stamps and sequence numbers. A two-factor authentication prototype for mobile phones using this method has been developed and has been used in practice for a year.
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Huang et al. (2013) studied this question.
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