counter mode with CBC-MAC protocol (802.11i) (CCMP)
The CCMP protocol (Counter Mode with CBC- MAC Protocol) uses the Advanced Encryption Standard ( AES) with its Counter Mode with CBC-MAC ( CCM) for encryption and the key block chain (CBC), furthermore the MAC code for authentication. The integrity of the header is protected by the Message Integrity Check( MIC).
802.11i prescribes the CCMP protocol for encryption, which must use the Robust Secure Network( RSN). In addition, the older encryption protocols Wired Equivalent Privacy(WEP) and Temporal Key Integrity Protocol( TKIP) are still possible, as well as the Wireless Robust Authentication Protocol( WRAP) as an option.
The CCMP protocol is the encryption method with the most secure encryption for WLANs and the only security protocol that can be used in 802.11n and 802.11ac WLANs.
Another encryption protocol that offers comparable security, but with significantly higher performance, is the Galois Counter Mode Protocol (GMCP).