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Understanding Have I Been Pwned's Use of SHA-1 and k-Anonymity

Troy Hunt

Later in 2018, I did the same thing with the email address search feature used by Mozilla, 1Password and a handful of other paying subscribers. My own email address begins with a "t", so it must be mine! It works beautifully; it's ridiculously fast, efficient and above all, anonymous. And for what?

Passwords 133