DES Encryption Explained in Tamil: Understand the Basics Without Memorization 🔐

#cybersecurity #DESCipher #DES Basics
This is our ambitious project started to explain the origin, evolution, present, and future of cyber security based on the following books in Tamil

Cybersecurity session 07b: DES Key Schedule and DES Decryption Tamil Part 2
https://www.youtube.com/watch?v=scA3Ge2SdTg
Code book by Simon Singh in Tamil
This Is How They Tell Me the World Ends: The Cyberweapons Arms Race by Nicole Perloth in Tamil
CISSP - Certified information security professional in Tamil

Cybersecurity session 07a: DES Encryption Tamil Part 1

00:00 Introduction
00:48 Math basics for DES - Bits and Ascii code
05:00 Xor and Vernam cipher
08:35 Math basics for DES - Functions
10:43 Block Cipher Basics
13:53 Block Cipher - Confusion
15:34 Block Cipher - Diffusion
21:42 Feistel cipher Details
29:17 DES Introduction
33:52 DES Structure
36:14 DES Internals - Encryption Rounds
40:09 DES Function F
43:05 DES Function F - Expansion & Round Key
46:49 DES Function F - S boxes (Substitution boxes)
48:51 DES Function F - Permutation
50:54 DES Internals - Initial Permutation & Final Permutation
55:06 Important DES Encryption Facts
56:29 Thanks to Christoff Par for reference


I want to thank Christoff Par for his lecture about DES and where i learned more intricacies and facts about DES. Most of the content with respect to DES is inferred from his lecture. The following link leads to his full lecture on DES

https://www.youtube.com/watch?v=kPBJIhpcZgE&ab_channel=IntroductiontoCryptographybyChristofPaar

I want to thank the university of Siegen for their open-source tool Crypttool which I have used in this session for the demonstration of Enigma Cipher

You can download the tool from the following link
https://www.cryptool.org/en/

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