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/ Follow us here: Discord: https://discord.gg/6RpnNmVyZv Instagram: https://www.instagram.com/letslearnke... FB: https://www.facebook.com/Letslearnkelvi Twitter: https://twitter.com/letslearnkelvi Blog: https://medium.com/@letslearn.kelvi