共查询到19条相似文献,搜索用时 156 毫秒
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文章提出了一种基于椭圆曲线可认证的电子注册方案。注册码的生成与验证环节采用了椭圆曲线的思想。注册码的网上分配是基于一种椭圆曲线数字签名可认证密钥分配方案。整个过程保证了网上电子注册的安全可靠性,同时还对其安全性进行了分析。 相似文献
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在量子密钥分配协议中存在这样一个基本假设,即攻击者不能同时获得量子信道和经典信道上的信息;为解决这一假设性难题,对量子的纠缠特性进行了研究,提出一种基于GHZ三重态的身份认证与密钥分配方案,该方案在建立一次量子信道后利用GHZ三粒子的关联性实现通信双方与仲裁第三方三者之间的身份认证,然后利用远程传态实现通信密钥分配以及新认证密钥的分配,确保通信方身份不可伪造与通信信息安全,最后结合常见的攻击方式论证了该方案的安全性。 相似文献
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指出3GPP提出的3G认证和密钥分配方案存在的安全漏洞。针对存在安全问题提出一个基于NTRU公钥密码体制的3G认证和密钥分配方案,该方案中将原认证和分配方案进行明文传输的身份信息与各安全参数用NTRU公钥加密算法进行加密保护,防止了恶意攻击者对身份信息以及安全参数的伪造与篡改,提高了认证和密钥分配方案的安全性和可靠性。同时该方案保持了原认证方案的结构模式,易于从原方案进行扩展实现。由于NTRU公钥密码方案在计算开销和带宽开销上的优势,使得该方案能在计算资源与存储资源都相对有限的移动通信网络环境下实现。 相似文献
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针对异构无线传感器网络,提出一种混合密钥预分配方案。该方案针对异构节点采用不同密钥预分配策略:高级节点采用基于身份的公钥密码机制进行节点间的认证和密钥协商;普通节点主要采用基于单向散列链的随机密钥预分配策略,在高级节点的辅助下进行对偶密钥的建立。在对偶密钥建立过程中,采用共享密钥发现和密钥协商相结合的方法,充分发挥公钥密码机制和随机密钥预分配策略的优势,达到较好的安全连通性和抗毁性。理论分析和仿真试验结果证明方案的可用性和安全性。 相似文献
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利用Yang等人的一个基于身份的并且错误容忍的会议密钥分配方案,提出了一种改进的会议密钥分配协议算法,并分析了该协议的正确性和安全性。分析结果表明,该方案不但实现了即使存在恶意参与者的情况下,诚实参与者也能协商出一个共同的会议密钥的目的;而且能够有效地抵抗被动攻击和主动攻击,安全高效,具有很强的实用性。 相似文献
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提出一种基于(t, n)门限秘密共享技术的分布式口令认证密钥交换方案。用户口令的验证密钥通过秘密共享方案在服务器组内进行分配,验证任务需要t个服务器协调来完成,任意t-1个服务器合谋无法获得诚实服务器关于口令验证的任何信息。动态生成每个服务器的局部密钥,保证了方案的前向安全性。通过身份认证的各用户之间以对服务器组保密的方式交换会话密钥。该方案在DDH假设下被证明是安全的。 相似文献
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Identity-based fault-tolerant conference key agreement 总被引:1,自引:0,他引:1
Xun Yi 《Dependable and Secure Computing, IEEE Transactions on》2004,1(3):170-178
Lots of conference key agreement protocols have been suggested to secure computer network conference. Most of them operate only when all conferees are honest, but do not work when some conferees are malicious and attempt to delay or destruct the conference. Recently, Tzeng proposed a conference key agreement protocol with fault tolerance in terms that a common secret conference key among honest conferees can be established even if malicious conferees exist. In the case where a conferee can broadcast different messages in different subnetworks, Tzeng's protocol is vulnerable to a "different key attack" from malicious conferees. In addition, Tzeng's protocol requires each conferee to broadcast to the rest of the group and receive n - 1 message in a single round (where n stands for the number of conferees). Moreover, it has to handle n simultaneous broadcasts in one round. In this paper, we propose a fault-tolerant conference key agreement protocol, in which each conferee only needs to send one message to a "semitrusted" conference bridge and receive one broadcast message. Our protocol is an identity-based key agreement, built on elliptic curve cryptography. It is resistant to the different key attack from malicious conferees and needs less communication cost than Tzeng's protocol. 相似文献
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基于移动网络的会议系统,着重于共享密钥的建立、分发与更新,对会议参与者的恶意或虚假消息,以往的方案不能阻止。提出了一种基于概率验证的方法,将其应用于移动会议的设计,可以有效地降低方案运行中的垃圾信息。 相似文献
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针对P2PSIP多媒体会议低延时、高扩展性需求,提出一种分级的会议密钥管理协议HOAKA。根据处理能力将会议节点分成两级,由少量高性能节点负责会议管理,所有成员通过单向累加器算法协商会议密钥。研究结果表明,HOAKA不仅具有较高的安全性,而且计算、存储开销低,密钥更新时延小,具有良好的可扩展性。 相似文献
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Sheng Zhong Author Vitae 《Computers & Electrical Engineering》2008,34(5):357-367
Conference call is a key functionality that a wireless network should support. When a conference call is set up in a wireless network, conference attendees should be authenticated. In many applications, the attendees also need to be anonymous. In this paper, we propose a very efficient protocol for authenticated and anonymous conference key setup. Our protocol uses only symmetric-key encryptions/decryptions and hashing and is thus much faster than any existing protocol using public-key cryptography. In addition to the conference key setup protocol, we also present two protocols, for authenticated call setup and authenticated handoff, respectively. These two protocols are also much faster than existing protocols based on public-key cryptography. Consequently, a system using the three protocols presented in this paper will have both high security and high efficiency. 相似文献
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目前提出的密钥协商协议大部分都是基于Diffie-Hellman交互,对协商信息进行认证,并在成员之间建立一个会话密钥,实施安全通信。本文找出了文献[1]中的两个安全漏洞,利用双线性映射性质,提出了一种基于用户ID的会议密钥协商方案。此方案能够有效地抵抗重放攻击、合谋攻击、假冒攻击、中间人攻击,与文献[1]的方法相比,具有更高的安全性和效率,在多对多网络通信中有着很强的实用性。 相似文献
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在参加会议的各方共同协商会议密钥时,为了确保用于构造密钥的协商信息的真实性,通常需要对协商信息进行认证。数字签名和共享秘密是两种常用的认证方法。介绍了利用椭圆曲线上Weil配对构造的基于身份的公钥密码体制。分别利用基于身份的数字签名方案和基于身份的长期共享密钥设计了两个可认证会议密钥协商协议。协议具有较强的安全性和较高的效率,可应用于各种需要多方共同协商会话密钥的环境。 相似文献
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Most conventional conference key agreement protocols have not been concerned with a practical situation. There may exist some
malicious conferees who attempt to block conference initiation for some purposes, e.g. commercial, political or military benefit.
Instances where conference must be launched immediately due to emergency, efficient detection of malicious behavior would
be needed. Recently, Tzeng (IEEE Trans. Comput. 51(4):373–379, 2002) proposed a fault-tolerant conference key agreement protocol
to address the issue where a conference key can be established among conferees even though malicious conferees exist. However,
his protocol might be complex and inefficient during fault-detection. In the case where a malicious conferee exists and a
fault-tolerant mechanism is launched, complicated interactions between conferees will be required. In this paper, we introduce
a novel strategy, where any malicious conferee may be identified and removed from the conferee list without any interaction.
With such a non-interactive fault-tolerance, conferences could be established and started efficiently. A complete example
of our protocol will be given to describe the fascinating fault-tolerance. We analyse the security of our protocol regarding
four aspects, i.e. correctness, fault-tolerance, active attack and passive attack. The comparisons of performance between
our protocol and that of Tzeng are also shown. As a whole, the advantage of our protocol is superior to that of Tzeng under
the situation where malicious conferees exist.
相似文献
Chi-Sung LaihEmail: |
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