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Data Encryption Standard (DES) | Cryptography
Автор: Cyber BZU
Загружено: 2025-08-25
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🔐 Data Encryption Standard (DES) | Complete Explanation
In this video, we explain the DES algorithm step by step, covering everything you need to know:
Key Expansion (Key Scheduling) – how the original 64-bit key is reduced, shifted, and transformed into 16 subkeys.
Encryption Process – initial permutation, splitting into left and right halves, 16 Feistel rounds (expansion, XOR, S-box substitution, permutation), and the final permutation to produce ciphertext.
Decryption Process – using the same Feistel structure as encryption but applying the round keys in reverse order
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