共查询到17条相似文献,搜索用时 78 毫秒
1.
2.
Joux提出的三方密钥协商方案虽然简洁、高效,但不能抵抗中间人攻击。基于无证书公钥密码体制,提出一种新的无证书可认证多方密钥协商方案,新方案将Joux的三方协议拓展至多方,并且具有认证功能。由于新方案中所用的签名为短签名,所以整个认证过程计算效率较高,另外,新方案还具有简单证书管理、无密钥托管的优点,新方案满足无密钥控制、抗中间人的主动攻击、前向安全性和抗密钥泄露伪装攻击等多种安全特性。 相似文献
3.
4.
密钥协商协议应该在满足安全性的条件下,使实现协议所需的计算开销尽可能小。文中提出了一个基于身份的认证密钥协商协议BAKAP(ID-Based Authenticated Key Agreement Protocol)。该协议提供了已知密钥安全性、完善前向保密性、密钥泄露安全性、未知密钥共享安全性和密钥控制安全性。在该协议中,参与者只需执行两次椭圆曲线点乘法和一次双线性运算。该协议与已有协议相比,计算代价小。 相似文献
5.
在无证书公钥密码体制下对一种多方可认证密钥协商方案进行了分析,指出该方案无法抵抗合法用户的扮演攻击和口令偶尔泄露导致的危机。分析了该方案存在漏洞的原因,并在此基础上给出一个改进的密钥协商方案。新方案引入密钥种子和口令进化机制解决了上述问题,同时消除了冗余消息,降低了用户占用的带宽。分析表明新方案的安全性更强。 相似文献
6.
7.
目前大部分基于身份的三方认证密钥协商协议都存在安全缺陷,文中在Xu等人提出的加密方案的基础上,设计了一种基于身份的三方认证密钥协商协议.该协议的安全性建立在BDDH假设基础上,经安全性分析,协议具有已知密钥安全,PKG前向安全,并能抵抗未知密钥共享攻击和密钥泄露伪装攻击,因此该协议是一个安全的三方密钥协商协议. 相似文献
8.
9.
10.
安全的认证密钥协商协议研究 总被引:1,自引:0,他引:1
对基于证书的密钥协商协议的设计与分析进行了比较深入的研究,研究内容包括:可证明安全的基于证书的密钥协商协议以及一种新的可认证密钥协商协议。主要研究成果有:介绍了密钥协商协议的概念和安全特性;提出一个新的认证密钥交换协议AKE-1。AKE-1效率较高,并且在最新的eCK07模型下是安全的,证明基于随机预言假设和CDH假设。另外,基于AKE-1,提出一轮的变体(满足只有一个实体在线)和三轮的变体(提供密钥确认属性),以满足不同的应用。 相似文献
11.
Two-party certificateless authenticated key agreement(CL-AKA) protocol is a hot topic in the field of wireless communication security. An improved two-party CL-AKA protocol with enhanced security is proposed,which is of provable security and unforgeability in the extended Canetti-Krawczyk (eCK) security model based on the hardness assumption of the computational Diffie Hellman (CDH) problem. Compared with other similar protocols, it is more efficient and can satisfy security properties such as free of the centralized management of certificate and key, free of bilinear pairings, two-party authentication, resistant to unknown key-share attack, key compromise impersonation attacks, the man-in-the-middle-attack of key generation center (KGC), etc. These properties make the proposed protocol have better performance and adaptability for military communication. 相似文献
12.
Many certificateless two‐party authenticated key agreement schemes using bilinear pairings have been proposed. But the relative computation cost of the pairing is approximately twenty times higher than that of the scalar multiplication over elliptic curve group In order to improve the performance we propose a certificateless two‐party authenticated key agreement scheme without bilinear pairings in this paper. A security proof under random oracle model is also provided. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
13.
Wireless Networks - Wireless group communication has gained much popularity recently due to the increase in portable, lightweight devices. These devices are capable of performing group... 相似文献
14.
Telecommunication Systems - Network slicing technology is a core part of 5G network, which enables users to access the suitable network on demand and increases the flexibility of network resources... 相似文献
15.
16.
Wang Changji Yang Bo Wu Jianping 《电子科学学刊(英文版)》2005,22(5):485-489
In 1999, Seo and Sweeney proposed a simple authenticated key agreement protocol that was designed to act as a Diffie-Hellman key agreement protocol with user authentication. Various attacks on this protocol are described and enhanced in the literature. Recently, Ku and Wang proposed an improved authenticated key agreement protocol, where they asserted the protocol could withstand the existing attacks. This paper shows that Ku and Wang's protocol is still vulnerable to the modification attack and presents an improved authenticated key agreement protocol to enhance the security of Ku and Wang's protocol. The protocol has more efficient performance by replacing exponentiation operations with message authentication code operations. 相似文献
17.
针对传统跨域密钥协商协议安全性不足问题,提出一种新的跨域量子密钥协商协议。在无证书密钥协商体系下,采用量子密钥协商与经典密码算法结合的方案,提高了协议适应现有通信网络架构的能力。密钥协商过程使用三粒子量子隐形传态,利用量子态不可克隆定理保障协商过程中密钥的安全性。与其他方案相比,本协议具有较高的量子比特效率,并且可以抵抗中间人攻击、重放攻击等多种内部和外部攻击手段。 相似文献