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认证密钥协商是保证参与者后续通信安全的一种重要机制。2007年,J.Oh等人提出了一种新的利用椭圆曲线密码体制的基于身份的认证密钥协商协议,该协议最大的特点是可以通过一次会话密钥协商过程生成两个会话密钥。但研究发现,该协议不能抵抗基本的冒充攻击和密钥泄露冒充攻击,详细地描述了这两个安全弱点后提出了一种新的改进方法,并分析了新协议的安全性。 相似文献
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多密钥协商协议可以在一次会话中协商出多个会话密钥,大大降低了密钥协商的成本,因此受到研究者们的关注。提出了一种新的基于签名的多密钥协商协议,新协议利用传统的签名方案实现参与者之间信息的隐藏,并通过引入Hash函数来加强协议的安全性。对新协议的安全性和计算量进行了讨论,结果表明,新协议在减少计算量的前提下实现了协议双方的安全密钥协商。 相似文献
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群组密钥协商(GKA)是保证随后安全通信的重要手段之一。提出了一种新的群组密钥协商协议,在协议中,参与者可以通过一系列算法对其他参与者的真伪进行验证。该协议以较低的计算成本实现参与者安全的会话密钥协商,具备可容错性和长期私钥可重用性的特点。分析表明可抵抗多数常见攻击。 相似文献
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提出了一种新的身份认证与密钥协商协议,该协议可以实现通信双方的相互认证,并通过协商产生安全的会话密钥。协议将对称密码体制和非对称密码体制有机地结合起来,非对称密码体制采用密钥比特少且安全性高的椭圆曲线密码体制。经过性能分析,该协议安全、有效,比较适合在移动通信系统中使用。 相似文献
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密钥协商是安全通信的重要环节,通过密钥协商协议可在通信节点之间建立共享会话密钥,以便实现网络中的安全通信。在物联网环境下,文章提出的密钥协商协议是在基于身份的可认证密钥协商基础上的无双线性对的可认证密钥协商协议。该协议主要包括3个部分:初始化、参数提取和密钥协商。与利用双线性对的密钥协商协议相比,该协议不仅提供了相同层次的安全性与可扩展性,且在能量开销、时间开销和计算复杂度方面具有明显的优势。 相似文献
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一种可认证的群组密钥协商协议 总被引:1,自引:0,他引:1
群组密钥协商协议可以使得所有组员协商出一个相同的密钥,该密钥可以被用到后续的组员之间的安全通信中,保证群组通信的机密性、完整性和真实性。本文在可认证双方密钥认证协议和BD群组密钥协商协议的基础上,提出了一种可认证的群组密钥协商协议(ABD)。和BD相比,ABD不仅能抵抗被动攻击还能抵抗主动攻击。 相似文献
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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. 相似文献
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Key management is an important building block for all security operations in sensor networks. Most existing key management schemes try to establish shared keys for all pairs of neighbor sensors; hence, a large number of keys need to be preloaded on each sensor, which necessitates a large key space for the nodes in the network. The recent trend in research is to mainly consider homogeneous sensor networks, and to a lesser degree heterogeneous sensor networks, for key management. In this paper, we propose a novel key agreement protocol which is based on pairing-based cryptography over an elliptic curve. Using this protocol, any two nodes that need to communicate can independently compute the same secret key by using pairing and identity-based encryption properties. The proposed protocol significantly reduces the key space of a node. Additionally, the security analysis of the proposed protocol shows that it is robust against a number of attacks including wormhole attack, masquerade attacks, reply attacks, and message manipulation attacks. 相似文献
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Sangho Lee Author Vitae Jong Kim Author Vitae Author Vitae 《Journal of Systems and Software》2009,82(7):1163-1167
A fault-tolerant conference-key agreement protocol establishes a shared key among participants of a conference even when some malicious participants disrupt key agreement processes. Recently, Tseng proposed a new fault-tolerant conference-key agreement protocol that only requires a constant message size and a small number of rounds. In this paper, we show that the Tseng’s protocol cannot provide forward and backward confidentiality during a conference session for the proposed attack method. We also show that a simple countermeasure—re-randomizing short-term keys of some participants—to avoid the proposed attack can be broken by extending the proposed attack method. 相似文献
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一种抗阻断攻击的认证组密钥协商协议 总被引:1,自引:0,他引:1
一个非认证的组密钥协商协议不能对通信参与者和消息进行认证,它必须依赖认证的网络信道或其它的认证方法.分析了Burmester等人在认证广播信道下提出的著名组密钥协商协议,指出它不能抵抗内部恶意节点发起的密钥协商阻断攻击,该攻击导致组内其它诚实节点不能正确计算出一致的组密钥.提出了一种改进的认证的组密钥协商协议,在原协议中加入了消息正确性的认证方法,能够对组内恶意节点进行检测,并在随机预言模型下证明了改进的协议能够抵抗密钥协商阻断攻击. 相似文献
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Security of robust generalized MQV key agreement protocol without using one-way hash functions 总被引:1,自引:0,他引:1
The MQV key agreement protocol has been adopted by IEEE P1363 Committee to become a standard, which uses a digital signature to sign the Diffie–Hellman public keys without using any one-way hash function. Based on the MQV protocol, Harn and Lin proposed a generalized key agreement protocol to enable two parties to establish multiple common secret keys in a single round of message exchange. However, the Harn–Lin protocol suffers from the known-key attack if all the secret keys established are adopted. Recently, Tseng proposed a new generalized MQV key agreement protocol without using one-way hash functions. Tseng claimed that the proposed protocol is robust since the new protocol can withstand the forgery attack and the known-key attack. In this paper we show that this protocol is not secure since the receiver can forge signatures. We also propose an improved authenticated multiple-key agreement protocol, which is secure against the forgery attack and the known-key attack. 相似文献