>>106355477
If someone found a practical backdoor, it would be worth billions (not just millions) to governments and corporations, because the entire global economy depends on it (TLS, VPNs, disk encryption, etc.). If there’s a backdoor, whoever has it is sitting on the most valuable secret in the world. Cascades (AES+Twofish, Kuznyechik+Serpent, etc.) are fine for peace of mind, but practically, you’re far more likely to get compromised through side channels, poor opsec, or metadata than through AES itself.