Updating TLS secrets – Secrets and Keys in TLS 1.3

• Kevanna Brown
• 08/31/202408/31/2024
• 0

12.4 Updating TLS secrets At any time after a successful handshake, Alice and Bob can update their application traffic keys using the KeyUpdate message. They accomplish this by first deriving new secrets server˙application˙traffic˙secret˙N+1 and client˙application˙traffic˙secret˙N+1 using the HKDF-Expand-Label function HEL as shown in Figure 12.13. After that, new application traffic keys are computed using a…