How the Bitcoins Were Stolen from Mt. Gox [video]
I watched this over the weekend. As someone who has spent an absurd amount of hours following this case: it breaks new ground, has great depth, and is absolutely riveting.<p>There are at least seven jaw dropping moments in it.  One is explaining how Bitcoin wallets pre-cache the next 100 change addresses the wallet will use, so that if someone steals your wallet without you noticing it and continues to use it you will <i>determinisically share the same change addresses on your next 100 transactions each</i>, which both leaves a forensic trail and also resulted in Gox continuing to send money into accounts controlled by the attacker.<p>Also, for bonus points: Gox allocated the new addresses as deposit addresses for new customers.  So when the attacker moved stolen coins, their change appeared to be deposited on Gox into the accounts of hithertofore innocent people.  (The attacker retained custody of it and Mt. Gox appears to not have swept it into e.g. offline storage, which we have fairly persuasive evidence did not really exist.)<p>This being the Bitcoin community, what would you expect someone who suddenly has 1,000 BTC credited to their exchange account to do?