Bcrypt Hash Generator & Verifier

Bcrypt Cryptographic Key-Derivation Algorithm: Bcrypt is an adaptive password-hashing function based on the Blowfish symmetric block cipher, designed by Niels Provos and David Mazières in 1999. It addresses hardware advances by incorporating a work factor parameter (cost rounds) that dynamically increases computation time. The hashing structure consists of: 1. Version Prefix: Identifies the algorithm variant (e.g., $2a$, $2b$, or $2y$). 2. Cost Parameter: A two-digit number indicating the number of key expansion rounds. Calculated as $2^{ ext{cost}}$ iterations. For example, a cost of 10 means 1,024 rounds; a cost of 12 means 4,096 rounds. 3. Salt: A 128-bit (22-character Base64-encoded) value that is unique to each password, preventing rainbow table lookups. 4. Hash Digest: The remaining 31 characters representing the output cipher value. Because Bcrypt uses a key expansion phase that makes encryption slow, it significantly hampers brute-force and GPU hardware acceleration attacks.