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Forum Discussion
5 characters- collision
i know 1password used haveibeenpwned.
according the website "When you search Pwned Passwords
The Pwned Passwords feature searches previous data breaches for the presence of a user-provided pass...
pathfinder76 probability of a collision on the first 5 hex characters of a SHA-1 hash is 16^-5 or ~1 in 1 million. If haveibeenpwned says there's a collision, best to assume yes, you have been pwned.
