Session Key

A session key ( session key dt ) is a one-time used, randomly generated, keys. It is, for example, in the hybrid using encryption. Here, a session key is securely transmitted after its creation using asymmetric encryption method, while the actual user data using the session key is encrypted even symmetrical.

When occurring in practice protocols, it is also customary to renegotiate session key after a relatively short time. This does not result in a unique session key to be uncovered decryption of all data traffic of the past or future.