#pre-authentication-integrity 1 post tagged pre-authentication-integrity. The Connection That Refused to Downgrade: Twenty-Five Years of SMB Cryptography, Finally Default-On May 25, 2026 How SMB 3.1.1 pre-authentication integrity, AES-256-GCM, and SMB-over-QUIC closed a 25-year attack tradition, and which attacks still survive in 2026.