Tag

#Blowfish

2 articles with this tag.

Key Derivation Functions Advanced

The bcrypt Algorithm

bcrypt is a password hashing function built from the Blowfish cipher with a deliberately expensive key setup. Learn how the salt, the cost, and the 72-byte limit work, how the hash string is built, and why its versions differ.

Oct 19, 2026 20 min read

Block Ciphers Intermediate

The Blowfish Algorithm

Bruce Schneier designed Blowfish as a free, fast alternative to DES, with a distinctive twist: its S-boxes are rebuilt from the encryption key through a key schedule that starts from the digits of pi. Learn how it works, with every value shown, and why it's still found in legacy systems today.

Aug 4, 2026 21 min read

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