Kex
Key exchange, abbreviated kex, is a class of cryptographic techniques that enable two or more parties to establish a shared secret over an insecure channel. That secret is used to derive symmetric keys for encrypting and authenticating subsequent communication. The central challenge is to produce a common value that both sides know but an eavesdropper cannot deduce, even if the channel is observed by an attacker.
In a typical kex protocol, participants negotiate a method, exchange public data, and compute the same secret
Kex is a component of higher-level protocols such as Transport Layer Security (TLS), Secure Shell (SSH), and
Security considerations include ensuring proper parameter sizes, resistance to active interception, and protection against replay. Forward