TKIP

Temporal Key Integrity Protocol (TKIP) is an enhancement to WEP encryption. It uses a set of algorithms to rotate session keys. The protocol's enhanced encryption includes a per-packet key mixing function, a message integrity check (MIC), an extended initialization vector (IV) with sequencing rules, and a re-keying mechanism. The encryption keys are changed (re-keyed) automatically and authenticated between devices after the re-key interval (either a specified period of time, or after a specified number of packets has been transmitted).