WEP Security Analysis and Enhancement Techniques

Wired Equivalent Privacy (WEP) is an IEEE 802.11 standard implemented to provide security to data transmitted on wireless networks. In this paper we enhance the WEP security by improving the authenticity, integrity and confidentiality mechanisms. WEP uses static 40 bit as pre-shared secret key for pseudo noise sequence generation. Our method uses dynamic key which keeps changing time to time depending upon the traffic rate on the network. This approach results into more random pseudo noise sequence. A large number of different encryption keys are generated using this approach. The integrity check value of data generated using cyclic redundancy check polynomial has been modified by using message authentication code. This message authentication code technique allows access to authorized clients.