The Who, What, Why and How of the Ongoing Transaction Malleability AttackFor the past several days, the Bitcoin network has been plagued by a so-called “transaction malleability attack.” Bitcoin users have experienced a number of annoyances, causing confusion and frustration. And while the transaction malleability issue is well-known and has plagued the Bitcoin network before, to many it is still unclear what it is, why it is a problem, who is causing the attack right now, and what can be done about it...
https://bitcoinmagazine.com/articles/the-who-what-why-and-how-of-the-ongoing-transaction-malleability-attack-1444253640
