A Review of Existing 4-bit Crypto S-box cryptanalysis Techniques and Two New Techniques with 4-bit Boolean Functions for Cryptan
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9.3 THE DES S-BOXES, P-BOX, AND INITIAL PERMUTATION (IP) - Computer Security and Cryptography [Book]
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S-Box Design - Symmetric Ciphers and Hashes - Modern Cryptography: Applied Mathematics for Encryption and Informanion Security (2016)
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What is Data Encryption Standard (DES)? Definition, Working, Advantages and Disadvantages - Binary Terms
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