Malleability-Attack: Why It Matters

Many in the crypto-sphere have heard of “transaction malleability” and that it’s “bad”. But, what is “transaction malleability” and why is it bad? Let’s dive into it quickly.

In a cryptocurrency such as Bitcoin, transactions are the atomic operations that transfer value between users. Users create transactions and publish them to the network. Those transactions propagate the network and are eventually mined into the blockchain. The blockchain is used by the recipients to determine if a transaction is confirmed or not.