Replay attack
Reusing a valid authorization where it should no longer apply or should never have applied.
In more detail
A signature can be cryptographically valid but inappropriate for a second action or another network. Systems use nonces, deadlines and signing domains to restrict reuse. Ethereum transaction chain IDs provide one kind of network binding; other signed messages need their own suitable replay protection.
How you might use it
"This authorization already ran once. Without recording its consumed nonce, the system accepts the same signature again."
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