# AES S_BOX Generator additive constants

I try to generate other S_BOX for AES but I don't realize how to choose additive constants for S_BOX from decryption if for encryption it is 0x63 why is 0X05 used for decryption?

• If you're looking to design an AES-like cipher, well, the fact that you need to ask this question would appear to indicate that you're seriously out of your depth... – poncho Mar 24 at 14:11
• it is 0x05 for decryption BECAUSE 0x63 is used for encryption, as that is the only value that satisfies the variable in the inverse equation – Richie Frame Mar 24 at 21:41