Understanding the Feistel Cipher Structure and Its Encryption/Decryption Process

Feistel Cipher Structure | Feistel Cipher Encryption Decryption Process Follow my blog : https://www.chiragbhalodia.com/2021/09/feistel-cipher-structure.html In this video, I have explained Feistel Cipher encryption and decryption process has been covered. Also explained working of Feistel Cipher Structure. Introduction of Feistel Cipher Structure: Feistel proposed a scheme to produced a block cipher using permutation and substitution alternatively. The inputs to the encryption algorithm are a plaintext block of length 2w bits and a key Ki. The plaintext block is divided into two halves, LE0 and RE0. The two halves of the data pass through rounds of processing and then combine to produce the ciphertext block. Working of Feistel Cipher Structure A substitution is performed on the left half of the data. This is done by applying a round function F to the right half of the data and then taking the exclusive-OR of the output of that function and the left half of the data. The round function has the same general structure for each round but is parameterized by the round subkey Ki. Permutation is performed that consists of the interchange of the two halves of the data. This structure is a particular form of the substitution-permutation network (SPN) proposed by Shannon. 0:00 Introduction 0:30 Introduction of feistel Cipher Structure 3:19 Working of Feistel Cipher Structure 5:53 Encryption & Decryption Diagram of Feistel Cipher If you like my video contents, please LIKE, COMMENT, SUBSCRIBE & SHARE with your friends. -------------------------------------------------------------------------------------------------------------- Check out other video on my channel Block Cipher and Stream Cipher: https://youtu.be/-gQrm5j0RkQ Confusion & Diffusion (Frustrated Statistical Analysis or Claud Shannon Properties): https://youtu.be/PJrW6ZqQipo Feistel Cipher Structure (to understand DES): https://youtu.be/emJ0p6h48u4 Data Encryption Standard (DES) Algorithm: https://youtu.be/cVhlCzmb-v0 DES Example using Animation: https://youtu.be/3YBwhWuXZ0o Strength & Weakness of DES, Avalanche effect in DES: https://youtu.be/Xy1hver_aaw Advanced Encryption Standard (AES) Algorithm with structure: https://youtu.be/X8whYEWoDSI AES Example using Animation: https://youtu.be/ZPLEtxxjCYA Key expansion in AES: https://youtu.be/14SAn4IEAHk -------------------------------------------------------------------------------------------------------------- You can always connect with me at: Follow my blog: https://www.chiragbhalodia.com Like my Facebook page: https://www.facebook.com/chiragbhalodia25 Follow me on Instagram: https://www.instagram.com/chiragbhalodia.25 Follow me on twitter: https://twitter.com/chiragsbhalodia Join telegram group: https://t.me/chiragbhalodia Subscribe me on youtube: https://www.youtube.com/c/ChiragBhalodia Follow me on Quora: https://www.quora.com/profile/Chirag-Bhalodia-2 -------------------------------------------------------------------------------------------------------------- Playlist available on my channel: Network Security (CNS, INS, IS): https://youtube.com/playlist?list=PLzQqHxFtQGyfiYWaDnasLdy1JPK3JS06o Computer Network (CN) with animation: https://youtube.com/playlist?list=PLzQqHxFtQGycfs9Vn8BYy0ic0wh-oL9UC VFX Animation & Fun Videos: https://youtube.com/playlist?list=PLzQqHxFtQGyd9esvf-t5XYOKhxQS0tDWx Comupter Organization & Architecture (COA, CA, CO): https://youtube.com/playlist?list=PLzQqHxFtQGyd-uDzS9vov8hJfm03X_SzC Assembly Language Programming: https://youtube.com/playlist?list=PLzQqHxFtQGyeTa82xQyceYxaf-iyZBICw Computer Graphics: https://youtube.com/playlist?list=PLzQqHxFtQGycg_TJBA6uFGDLwbotjs68h #chirag_bhalodia #chiragbhalodia #networksecurity #cryptography #Feistel_Cipher #Feistel_Cipher_Structure #Feistel_Cipher_Encryption #Feistel_Cipher_Decryption #Working_of_feistel_cipher_structure Keep learning, keep supporting 🤝✨💯