LTE认证协议(EPS-AKA)弱点解决方案

Mohammed Abdrabou, A. Elbayoumy, Essam Abd El-Wanis
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引用次数: 34

摘要

EAP (Extensible Authentication Protocol)是LTE (Long Term Evolution)网络中的一种认证框架。EAP-AKA是基于挑战-响应机制的认证和密钥协议(AKA)机制的EAP方法之一,EAP-AKA用于第三代移动网络,然后修改并继承到第四代移动网络(LTE)作为演进分组系统认证和密钥协议(EPS-AKA)机制,当用户通过EUTRAN访问网络时使用。EPS-AKA漏洞是用户身份泄露、中间人攻击和拒绝服务(DoS)攻击,因此必须有一个强大的身份验证机制取代EPSAKA来避免此类攻击。为了解决这些问题,本文提出了基于简单密码指数密钥交换(SPEKE)和对称密钥加密的改进进化分组系统认证与密钥协议(MEPS-AKA)协议,该协议在用户每次访问网络时执行预认证程序生成动态密钥,并对发送或接收的每条消息进行保密保护。使用Scyther工具验证了所提出协议的有效性。用C语言对EPS-AKA和MEPS-AKA进行了仿真,计算了两种算法的执行时间。采用c#编程语言,用客户端-服务器应用程序对所提出的协议进行了仿真。
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LTE Authentication Protocol (EPS-AKA) weaknesses solution
Extensible Authentication Protocol (EAP) is an authentication framework in Long Term Evolution (LTE) networks. EAP-AKA is one of the methods of EAP which uses the Authentication and Key Agreement (AKA) mechanism based on challenge-response mechanisms, EAP-AKA is used in the 3rd generation mobile networks then modified and inherited to 4th generation mobile networks (LTE) as Evolved Packet System Authentication and Key Agreement (EPS-AKA) mechanism which is used when the user access the network through EUTRAN. EPS-AKA vulnerabilities are disclosure of the user identity, Man in the Middle attack and Denial of Services (DoS) attacks so a robust authentication mechanism must replace EPSAKA to avoid such attacks. In this paper, Modified Evolved Packet System Authentication and Key Agreement (MEPS-AKA) protocol based on Simple Password Exponential Key Exchange (SPEKE) and symmetric key cryptography is proposed to solve these problems by performing a pre-authentication procedure to generate a dynamic key every time user access to the network, also each message send or received is confidentially protected. Scyther tool is used to verify the efficiency of the proposed protocol. EPS-AKA and MEPS-AKA are simulated using C programming language to calculate the execution time for both algorithms. The proposed protocol is simulated using a client-server application program using C# programming language.
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