Broken block ciphers | Data Encryption Standard | Feistel ciphers

Lucifer (cipher)

In cryptography, Lucifer was the name given to several of the earliest civilian block ciphers, developed by Horst Feistel and his colleagues at IBM. Lucifer was a direct precursor to the Data Encryption Standard. One version, alternatively named DTD-1, saw commercial use in the 1970s for electronic banking. (Wikipedia).

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Nibble | Block cipher | S-box | Substitution–permutation network | Advanced Encryption Standard process | Differential cryptanalysis | Cryptography | Exclusive or | Data Encryption Standard