Transaction Malleability, Mutability

Definition

The ability of someone to change (mutate) unconfirmed transactions without making them invalid, which changes the transaction’s txid, making child transactions invalid.

Synonyms

• Transaction malleability

• Transaction mutability

Not To Be Confused With

• BIP62 (a proposal for an optional new transaction version that reduces the set of known mutations for common transactions)

Links

• Transaction malleability — Bitcoin.org Developer Guide

• Transaction malleability — Bitcoin Wiki

• BIP62: dealing with malleability — Bitcoin Improvement Proposals