Hello amelo@,
Duo Security helps protect against replay attacks through several security measures:
**One-Time Use Tokens**: Duo uses one-time use tokens generated by Time-based One-Time Passwords (TOTP) or HMAC-based One-Time Passwords (HOTP). These tokens are valid for a short duration and cannot be reused after they expire.
**Time Sensitivity**: The one-time use tokens generated by Duo are time-sensitive. They are only valid for a short period, usually 30 or 60 seconds. Any attempt to reuse these tokens after this timeframe will fail.
**Anti-Replay Mechanisms**: While specific details may not be publicly disclosed, MFA solutions like Duo typically employ anti-replay mechanisms internally to detect and prevent replay attacks. These mechanisms might involve tracking and validating token usage to ensure they are not reused.
**Secure Communication**: Duo uses secure communication channels and protocols to transmit authentication information. This helps prevent eavesdropping and interception of authentication data.
Best regards
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