Skip to main content

How Does the Verifier Prevent Replay Attacks on the Cryptographic Proof?

Replay attacks are prevented by including a unique, fresh element, such as a nonce or a block hash, in the data that is being proved and signed. This ensures that the cryptographic proof is only valid for the specific, current context.

If an attacker tries to "replay" an old proof, the verifier will detect that the unique element does not match the current state, invalidating the proof.

What Is the Verifier’s Role in a Zero-Knowledge Proof Protocol?
What Is a Replay Attack in the Context of a Signed Cryptocurrency Transaction?
How Does a Change in the Merkle Root Affect the Block’s Nonce and the Subsequent Mining Process?
What Is a Nonce in the Context of PoW?