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enamya | blog · Nov 4, 2025

Why bcrypt Can Be Unsafe for Password Hashing ?

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TL;DR: bcrypt ignores any bytes after the first 72 bytes, this is due to bcrypt being based on the Blowfish cipher which has this limitation. bcrypt has been a commonly used password hashing algorithm for decades, it’s slow by design, includes built-in salting, and has protected countless systems from brute-force attacks. But despite its solid reputation, it also has a few hidden limitations…

Read on /posts/bcrypt-limitation/

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