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论文题目：An Investigation of the Security Aspects of the LTE System
论文语种：英文
您的研究方向：网络安全
是否有数据处理要求：否
您的国家：英国
您的学校背景：一般学校
要求字数：3000
论文用途：本科毕业论文 Bachelor Degree
是否需要盲审（博士或硕士生有这个需要）：否
补充要求和说明：原本找你们代写过这篇文章5000字，现在再在这篇原文上加3000字。

An Investigation of the Security Aspects of the LTE System
Abstract
In order to maintain the competitiveness of market, 3GPP started the LTE system, which provided the higher system requirements, including lower cost per bit, increasing the operational capabilities, and flexible applying the existed frequency and new frequency. So LTE (Hannes, 2006) used some advanced wireless communication technologies in the designing process, such as the flat architecture of double node, OFDM (Orthogonal Frequency Division Multiplexing), MIMO (Multiple Input Multiple Output), multi-user scheduling, SFN (Single Frequency Network) and interference suppression between communities. System achieved the peak speed of unlink 50Mb/s and downlink 100Mb/s, and the system’s spectral efficiency and user throughput is 2 to 4 times of 3GPP Release6 HSxPA.
Long Term Evolution (LTE) system represents the latest developing direction of UMTS standard. And as a pure packet system it has new wireless interface and architecture and its spectral efficiency is 2 times of ISDPA/HSUPA. First, the paper analyzed the main contents of LTE system’s security aspect. Second, it provided the user security architecture of LTE system and provided the NDS architecture of IP network, described the work flow of IMS AKA and illustrated the security association between terminal and P-CSCF.  

Keyword: 3GPP LTE; Security; ESP; RRC; NAS;AKA flow; Secret key
 
Table of Contents
Chapter 1 Introduction 1
1.1 The Background of the Chosen Topic 1
1.2 Proposed Issues and Used Methods of This Chosen Topic 2
1.3 Significance of the Chosen Topic 2
1.4 Overall Structure of the Whole Dissertation 3
Chapter 2 Literature Review 4
2.1 Introduction of LTE System 4
2.2 The Relative Theories of LTE System Security 6
2.2.1 The evolution purposes of 3GPP LTE 6
2.2.2 The Key Technologies of LTE System 7
2.3 LTE-FDD and LTE-TDD 10
2.3.1 The Working Principle and Advantages of LTE-FDD 10
2.3.2 The Working Principle and Advantages of LTE-TDD 11
Chapter 3 The Investigation of LTE System’s Security Aspects 13
3.1 The Network Architecture of LTE System 14
3.2 The Security Architecture of LTE System 16
3.3 The Communication Session Management process of LTE System 17
3.3.1 User-Network Security 18
3.3.2 Network Domain Security 19
3.4 ESP, RRC and NAS Security Mechanism 22
3.4.1 ESP Security Mechanism 22
3.4.2 RRC Security Mechanism 23
3.4.3 Security Mechanism of NAS Layer 24
3.5 AKA Flow 25
3.5.1 UMTS AKA Flow 25
3.5.2 EAP AKA Flow 27
3.6 The Secret Key System of LTE System 29
3.6.1 The Architecture of LTE Secret Key System 29
3.6.2 The Correspondence between Secret Keys and Information Flow 31
Chapter 4 Conclusion 33
References 34

 
Chapter 1 Introduction
1.1 The Background of the Chosen Topic
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