Data Encryption Standard (DES) Explained: The Complete Guide 🔐
Discover the fundamentals of DES encryption with our step-by-step explanation. Learn how this classic cryptographic algorithm works and why it's still important today!
Cyber BZU
18 views • Aug 25, 2025
About this video
🔐 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
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
Video Information
Views
18
Likes
1
Duration
22:27
Published
Aug 25, 2025
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