Bcrypt Hash Generator & Verifier

How does Bcrypt Hashing work?

Bcrypt is a password-hashing function designed by Niels Provos and David Mazières, based on the Blowfish cipher. It incorporates a salt to protect against rainbow table attacks and is an adaptive function—over time, the iteration count (salt rounds) can be increased to make it slower, ensuring it remains resistant to brute-force search attacks even as hardware speeds increase.

Why Salt Rounds Matter

The salt rounds parameter represents the cost factor. It determines how many iterations of the hashing algorithm are performed (calculated as 2^rounds). For example, 10 rounds means 1,024 iterations, while 12 rounds means 4,096 iterations. While higher rounds significantly improve security against database leak decryptions, they require more computational time, so choosing a balance (usually 10-12 for user passwords) is standard.