基于强认证技术的会话初始协议安全认证模型

针对会话初始协议（SIP）的典型安全威胁,提出了基于强认证技术的SIP安全认证模型,并分析了其安全性。该认证模型通过智能卡和数字证书的强组合实现强认证,并据此对SIP做出相应扩展,将强认证技术有机地融入到SIP协议当中,实现了会话双方的安全认证,保证了SIP消息传输的机密性、真实性、完整性和不可否认性,从而提高了SIP的安全性。     

无双线性对的动态口令认证与密钥协商方案

提出了一种椭圆曲线密码体制下基于身份的双向认证方案,用于解决基于移动终端的动态口令机制身份认证方案在双向认证和会话密钥方面的不足。该方案使用移动端令牌生成动态口令,采用三次握手原理实现身份认证,支持安全会话密钥协商、一次性口令、双向认证和轻量级服务器存储。分析表明,该方案可以抵抗针对移动终端口令认证方案的常见攻击,安全有效,满足安全设计目标。     

SIP中基于身份认证的安全机制研究

因为简单、灵活和易扩展等特点,SIP将在3GPP中得到广泛应用,但是SIP本身缺少有力的安全机制使其面临很多安全威胁.文中对SIP中的安全问题和安全性要求进行分析,为了解决SIP中认证和消息加密的问题,把基于身份认证这种结构简单、应用容易的安全机制引入到SIP协议中,提出了一种新的认证加密方法.采用基于身份的加密机制使系统初始化简单,不需要繁琐的密钥协商步骤,并且维护容易.同时满足了SIP的安全要求,保证了会话建立和消息通信过程中的完整性、可靠性和不可抵赖性.     

一种基于ECC的SIP认证方案的提出与实现

随着会话发起协议（SIP）应用领域的不断扩大,SIP实体间通讯的安全问题成为了亟待解决的热点问题。对SIP的安全方案进行了讨论,分析了进行安全认证的方法,在此基础之上提出了一种新的基于椭圆曲线密码学（ECC）的认证方案,保证了SIP消息传输过程中完整性、机密性和不可抵赖性。     

基于信任域的SIP认证机制

会话初始协议（SIP）在设计之初没有考虑太多安全问题,其安全隐患十分严重。针对上述问题,介绍SIP协议的安全特性,针对其可能受到的安全威胁,讨论SIP协议的安全机制问题。在“信任域”的基础上提出一个完善的SIP安全认证机制,描述方案的具体应用场景,并指出SIP认证机制的进一步研究方向。     

基于ECDLP的SIP认证密钥协商协议

SIP协议是应用层控制协议,为了提高SIP协议的安全性,文中基于椭圆曲线离散对数问题的难解性,结合用户身份、用户口令及单向陷门函数F(),提出了一种基于ECDLP的SIP认证密钥协商协议.协议过程主要由初始化、注册、登录认证、口令修改四部分组成.安全分析表明,该协议实现了双向认证、提供了安全会话密钥,能抵抗口令猜测攻击、中间人攻击、重放攻击、冒充攻击、Denning-Sacco攻击等.与相关协议比较,本文所提出的基于ECDLP的SIP认证密钥协议具有更高的安全性,能更好的满足应用需求.     

基于身份密码的轻量级SIP安全方案

针对基于会话初始协议(SIP)的IP多媒体子系统(IMS)网络安全机制,分析了SIP协议存在的安全隐患,将身份密钥协商协议IBAKA和头域敏感信息完整性保护等机制有效结合,提出了基于身份密码的轻量级SIP安全方案。分析了该方案的安全性,并从安全性和抗攻击性方面与几种典型方案进行比较。比较结果表明,该方案克服了SIP协议的安全隐患,提高了协议的安全性。     

基于SIP协议的3G网络安全认证机制

简要说明了SIP协议的消息格式和会话建立的实现过程,分析了3G网络中目前存在的攻击类型和潜在的安全威胁,同时提出了SIP关于隐私和机密保护的主要方法,即加密算法和安全认证机制的紧密结合。主要讨论在3G网络应用层中作为信令协议的SIP的安全认证机制,包括当前一些基本的认证算法和认证类型以及一些改进的认证机制。最后指出一些能够提高3G网络安全性的在认证方面的新领域。     

SIP安全认证机制研究

会话发起协议（SIP）简单灵活,便于业务扩展,是使用最广泛的信令协议之一。但是它缺乏有效的安全认证机制,容易受到攻击。分析了SIP可能受到的攻击,对已有安全认证机制进行比较,并提出一种基于公钥的安全认证机制,增强了SIP域内和端到端的安全性。     

一种新的基于SAML实现SIP认证的方法

本文通过将SAML(Security Assertion Markup Language)的认证、授权框架应用于SIP(Session Initiation Protocol)中,提出了一种可对用户终端进行身份认证与授权管理的安全机制.其中,采用了SAML artifact的绑定方式,对SIP协议认证流程进行了改进,在SIP消息传递过程中解决了实体之间的认证与授权问题,实现了SAML语言与SIP协议的有机结合.该机制可抵御重放攻击、假冒攻击等多种安全威胁.     

会话初始协议安全认证机制的分析与改进

通过分析会话初始协议相关认证机制,指出认证中可能存在的安全威胁,如离线密钥猜测攻击和Denning-Sacco攻击。针对安全漏洞提出一种结合椭圆曲线密码的改进认证机制。安全性分析表明,改进的认证机制在提供客户端和服务器间双向认证的同时,能够完成会话密钥传递,确保认证的时效性,有效抵御离线密钥猜测攻击和Denning-Sacco攻击。     

对TAKASIP协议的分析和改进

会话初始化协议(SIP)提供了认证和协商会话密钥,能保证后续会话的安全。2010年,Yoon等(YOON E-J,YOO K-Y.A three-factor authenticated key agreement scheme for SIP on elliptic curves.NSS'10:4th International Conference on Network and System Security.Piscataway:IEEE,2010:334-339)提出一种新的三要素SIP认证密钥协商协议TAKASIP。但TAKASIP协议不能抵抗内部攻击、服务器伪装攻击、离线口令猜测攻击、身份冒充攻击和丢失标记攻击,并且没有提供双向认证。在TAKASIP协议基础上提出一种基于椭圆曲线密码三要素SIP认证协议ETAKASIP以解决上述问题。ETAKASIP基于椭圆曲线离散对数难题和椭圆曲线密码系统,提供了高安全性。该协议只需7次椭圆曲线点乘运算、1次椭圆曲线加法运算和最高6次哈希运算,有较高的运算效率。     

一种基于改进的HTTP摘要认证的SIP安全机制

SIP协议是当前IP电话中的主流协议,HTTP摘要认证机制被很多SIP系统作为安全机制,但存在客户端不能认证服务器端,且不支持密钥协商的缺陷。为解决这一不足,提出了一种基于改进的HTTP摘要认证的SIP安全机制,使得SIP安全解决方案更加完善,部署更加灵活。     

Practical authentication scheme for SIP

The Session Initiation Protocol (SIP) is commonly used to establish Voice over IP (VoIP) calls. However, the original authentication scheme for SIP-based service typically uses HTTP Digest authentication protocol, which is s not providing security at an acceptable level. In this paper, we propose a secure and practical password-only authenticated key agreement scheme for SIP using elliptic curve cryptography(ECC). Our scheme is remarkable efficient and quite simple to use. And yet we can provide the rigorous proof of the security for it. Therefore, the end result is more suited to be a candidate for SIP authentication scheme. In addition, we also suggest an extended scheme capable of providing anonymity, privacy, and location privacy to protect the user’s personal information and his real identity.     

A secure and efficient mutual authentication scheme for session initiation protocol

The Session Initiation Protocol (SIP) as the core signaling protocol for multimedia services is receiving much attention. Authentication is becoming increasingly crucial issue when a user asks to use SIP services. Many authentication schemes for the SIP have been proposed. Very recently, Zhang et al. has presented an authentication scheme for SIP and claimed their scheme could overcome various attacks while maintaining efficiency. In this research, we illustrate that their scheme is susceptible to the insider attack and does not provide proper mutual authentication. We then propose a modified secure mutual authentication scheme to conquer the security flaws in Zhang et al.’s scheme. Through the informal and formal security analyses, we demonstrate that our scheme is resilient possible known attacks including the attacks found in Zhang et al.’s scheme. In addition, the performance analysis shows that our scheme has better efficiency in comparison with other related ECC-based authentication schemes for SIP.     

Cryptanalysis and improvement of a robust smart card secured authentication scheme on SIP using elliptic curve cryptography

The session initiation protocol (SIP) has been receiving a lot of attention to provide security in the Voice over IP (VoIP) in Internet and mobility management. Recently, Yeh et al. proposed a smart card-based authentication scheme for SIP using elliptic curve cryptography (ECC). They claimed that their scheme is secure against known security attacks. However, in this paper, we indicate that Yeh et al.’s scheme is vulnerable to off-line password guessing attack, user impersonation attack and server impersonation attack, in the case that the smart card is stolen and the information stored in the smart card is disclosed. As a remedy, we also propose an improved smart card-based authentication scheme which not only conquers the security weaknesses of the related schemes but also provides a reduction in computational cost. The proposed scheme also provides the user anonymity and untraceability, and allows a user to change his/her password without informing the remote server. To show the security of our protocol, we prove its security the random oracle model.     

Design of a password-based authenticated key exchange protocol for SIP

The Session Initiation Protocol (SIP) is a signaling communications protocol, which has been chosen for controlling multimedia communication in 3G mobile networks. In recent years, password-based authenticated key exchange protocols are designed to provide strong authentication for SIP. In this paper, we address this problem in two-party setting where the user and server try to authenticate each other, and establish a session key using a shared password. We aim to propose a secure and anonymous authenticated key exchange protocol, which can achieve security and privacy goal without increasing computation and communication overhead. Through the analysis, we show that the proposed protocol is secure, and has computational and computational overheads comparable to related authentication protocols for SIP using elliptic curve cryptography. The proposed protocol is also provably secure in the random oracle model.     

一种基于能力的轻量级SIP安全机制研究

本文先简要概述了SIP应用背景和重要概念,然后详细分析了SIP面临的安全威胁以及现有安全解决方案,主要为安全认证和加密,讨论了几种典型方案的原理和不足.随后仔细研究了一种先进的基于共享用户密码进行密钥协商的轻量级的SIP安全认证、加密机制,并加入一次口令机制加以改进.随后借鉴了一种基于能力的IP-DOS控制思想,结合S...