Anti-Replay

Definitions

1. Intended to prevent replay attacks, where a valid captured message or credential is resent later to fraudulently repeat an action. Anti-replay protections often use nonces, timestamps, sequence numbers, or one-time validity.

   In plain English: Designed to stop attackers from reusing previously valid messages or credentials.

   Example: "The protocol needed anti-replay protections because signed requests could otherwise be reused by an attacker."

Related Terms

• Digital Signature
• HMAC
• HMAC Authentication
• Message Authentication Code
• Mutual Authentication
• Authentication Protocol
• Cryptographic Signature
• Non-Repudiation
• Replay Prevention