Data Security Model in IEEE 802.11 Radio Channel

A security system structure in the IEEE 802.11 protocol stack is studied. Weak points and vulnerability of the existing methods of data security are considered. A data security model for the IEEE 802.11-based wireless networks is developed with the application of the WEP and IPSec technologies. An example of construction of the secure network having a mixed structure is presented with a subnet providing a wireless access both in deploying a newly wireless network and in modernizing an already existing net infrastructure. The developed model is thoroughly compatible with the existing standards. Its multi-level modular structure will allow using new technological decisions and methods aimed at the cryptographic stableness improvement without a necessary replacement of the system architecture.