LTE s success a high throughput, low latency, and umbrella technology for wireless heterogeneous networks is highly affected by the researchers capability of solving its current security vulnerabilities. Mutual authentication was adopted by mobile networks to overcome vulnerabilities exploited by “IMSI catcher” and other active attacks. -LTE s success as a high throughput, low latency, and umbrella technology for wireless heterogeneous networks is highly affected by the researchers　capability of solving its current security vulnerabilities. Mutual authentication was adopted by mobile networks to overcome vulnerabilities exploited by “IMSI catcher” and other active attacks.