Understanding Have I Been Pwned's Use of SHA-1 and k-Anonymity
Troy Hunt
JUNE 30, 2022
It's also a slower hashing algorithm; still totally unsuitable for storing user passwords in an online system, but it can have a hit on the consuming service if doing huge amounts of calculations. My own email address begins with a "t", so it must be mine! And for what? It's a nonsense argument.
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