Summary of AES Round Transformation
The video focuses on the AES round transformation in encryption and decryption processes. It explains the four transformations used in each round: substitute bytes, shift rows, mix columns, and add round key. The importance of confusion and diffusion in encryption algorithms is highlighted, with a focus on substitution and permutation. Each transformation function is explained in detail, including how they alter the input state array. The session aims to help learners understand the AES encryption and decryption process thoroughly.
Notable Quotes
— 02:12 — « Lets focus on the First Transformation function which is the substitute bytes or simply sub bytes. »
— 06:55 — « The first row of the state is not altered, the second row is performed with a one-byte left circular shift, the third row is performed with a two-byte left circular shift, and the fourth row is performed with a three-byte left circular shift. »
— 10:11 — « Adding the round key is simply a bitwise XOR operation. »
Category
Technology