AES Encryption and Decryption

The video discusses AES encryption and decryption, focusing on the structure, key size, number of rounds, transformations, and key scheduling algorithm. The AES structure involves initial transformation, round keys, and multiple rounds with different transformations. The key size (128, 192, 256 bits) determines the number of rounds (10, 12, 14). Encryption involves adding round keys and performing transformations, while decryption reverses this process. The final round in both encryption and decryption has three transformations. Key scheduling algorithm expands the key for each round. The video emphasizes understanding AES structure, encryption/decryption processes, and transformations.

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