Abstract
Mobile communications play a significant role in our daily lives and are receiving greater attention from researchers as a result of the information and network technologies' quick growth. To meet the public's need for high speed, the 3GPP organization suggested the LTE mobile system. The LTE employs a hierarchical key management to enhance secure data transmission. However, the existing system lacks backward security and is susceptible to attack during the X2 handover procedure. We suggest an improved security feature by group key to address the mentioned problems and guard against malicious base stations and malicious attacks during the LTE x2 handover operation.
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