Replay Protection
Protocol or wallet techniques that prevent transactions from one chain being valid on another after a split.
Replay protection ensures that a transaction valid on one chain cannot be accepted on another. This can be implemented at the protocol level (e.g., different sighash rules or opcodes) or handled by wallets via coin-splitting and chain-specific metadata.
"Following a hard fork, the chain may adopt unique signature hashing rules so signatures from one chain are invalid on the other, preventing replays."
Related Terms
Replay Attack
→When a valid transaction from one chain is maliciously or accidentally broadcast and accepted on another chain after a fork.
Chain Split
→A permanent divergence into two or more incompatible blockchain histories.
Fork
→A fork is a divergence in a blockchain that results in two or more separate paths, often due to changes in consensus rules or protocol updates.
All terms and definitions may update as the Cryptionary improves.
