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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.
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key lucifer feistel bits block one variant left name data version horst ibm uses described operates cipher 4-bit byte encryption
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Lucifer (cipher) | Block sizes | 48, 32 or 128 bits | 1.00 | infobox |
| Lucifer (cipher) | Designers | Horst Feistel et al. | 1.00 | infobox |
| Lucifer (cipher) | First published | 1971 | 1.00 | infobox |
| Lucifer (cipher) | Key sizes | 48, 64 or 128 bits | 1.00 | infobox |
| Lucifer (cipher) | Rounds | 16 | 1.00 | infobox |
| Lucifer (cipher) | Structure | Substitution–permutation network, Feistel network | 1.00 | infobox |
| Lucifer (cipher) | Successors | DES | 1.00 | infobox |
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