Improve Complexity of Encryption Algorithms of 4G Standard -LTE Security

Today Corporations and individuals have demand of high-speed networks to support their everyday activities. For that LTE-Long Team Evolution is one of most popular 3GPP 4G standard cellular network made. The major issue to design any encryption and decryption algorithm is to improve the security level. Encryption and authentication procedures should protect networks from most attacks. LTE use 128-EEA1 (based on SNOW 3G) and 128-EEA2 (based on AES) encryption algorithm. But there is a trade-off between speed and security algorithms. So for security need algorithms which balance security with the speed of Data acquisition. Research In this paper we explain current EPS security mechanism as EEA2 with AES algorithm with counter mode. To improve complexity we do one time more Encryption so we make data more secure during transmission and protected again Attacks possibility. The entire EPS security mechanism will be implemented in MATLAB. In this paper we focused on encryption algorithms used for confidentiality protected transmission in LTE security and its MATLAB implementation for easy understanding.