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Blowfish
Blowfish
Bruce Schneier's 1993 Feistel block cipher — pre-AES era workhorse used in SSH, OpenSSH, and the bcrypt key schedule. Unique for its key-dependent S-box structure: the 4×256 S-boxes are entirely re-derived from each key, making it immune to weak-key attacks that plagued DES.
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Imported traces are validated and replayed locally. They never run a cipher operation automatically.
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A simple stream cipher performing byte-wise XOR operations between plaintext and key.
An unbreakable cipher when used with a truly random, single-use key of equal length to the plaintext.
Data Encryption Standard. A legacy 64-bit block cipher utilizing a 56-bit key size.
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