Security, Symmetric Encryption, Cryptography, Encryption.
a double round as shown below. Each double round consists of an odd and an even round. // Odd round QR(0, 4, 8, 12) // 1st column QR(1, 5, 9, 13) // 2nd column QR(2, 6, 10, 14) // 3rd column QR(3, 7, 11, 15) // 4th column // Even round QR(0, 5, 10, 15) // diagonal 1 (main diagonal) QR(1, 6, 11, 12)