Authentication
Non-Replayable Factor
A Non-Replayable Factor is an authentication element that cannot be reused successfully after it has already been used once or has expired.
Definition
A Non-Replayable Factor is an authentication proof whose value is valid only in a limited, controlled context, such as a time-bound code, signed challenge, or dynamic proof. It is important because replayable secrets weaken the real assurance level of multi-factor authentication.
The Ariovis perspective
Authentication strength should match the risk of the journey rather than impose the same friction everywhere. Ariovis looks for a balance between security, maintainability and user experience.
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