08-09-2026, 09:31 PM
For OSINT people: when you have several old dumps (bitcointalk, btc-e, exchanges), the highest-value cross-reference is email reuse, not password reuse. In the 2015 BT dump vs 2014 BTC-E dump, ~59k emails appear in both - same person, two accounts. Check the cracked password of one dump against the hash of the other only for those shared emails. Also filter placeholder emails (awesome@yahoo.com style) which accumulate dozens of passwords from form-filler junk.