This raises the problem of group key management.
这导致了群组密钥管理问题。
Group key management is one of the kernel problems in secure multicast.
而组密钥管理是安全组播的核心问题之一。
The scheme provides group key secrecy, forward secrecy and backward secrecy.
它提供的安全属性包括群组密钥保密性、前向保密和后向保密。
IP multicast group key management is essential for the IP multicast security.
IP多播组密钥管理问题是IP多播安全的核心问题。
The key tree based group key management algorithms are widely used in secure multicast.
安全组播目前主要采用基于密钥树的组密钥管理算法。
The group key agreement has been discussed as a special case of secure multi-party computation.
研究了安全多方计算的一个特例——组密钥协商。
But group key management in WSN faces a great challenge because of the resources are constrained.
然而由于传感器网络自身资源的限制，使得传感器网络的组密钥管理面临巨大的挑战。
Its core services provide authenticated group key agreement in relatively small dynamic peer groups.
它的核心服务是为一个相对较小的多播组提供验证的组密钥交换。
This paper puts forward Distributed LKH group key management protocol based on HLTN key architecture.
本文提出了采用限高树密钥结构的分布式lkh组密钥管理协议。
Group Key Agreement (GKA) is one of the important methods to ensure the subsequent secure communication.
群组密钥协商(GKA)是保证随后安全通信的重要手段之一。
An authenticated group key agreement scheme with admission control for dynamic peer groups was presented.
针对动态对等群组设计了一个具有许可控制功能并且可认证的密钥协商方案。
Then, a group key mechanism based on elliptic curve cryptosystem(ECC) is proposed, and which secrecy is proved.
其次，提出一种椭圆曲线的组密钥机制，证明了组密钥机制的安全性。
In group key management, the approach based on the key-tree is widely used to achieve logarithmic rekeying costs.
在群组密钥管理中，基于密钥树的方法可以达到对数级别的密钥更新代价而被广泛采用。
Compared with all kinds of key management schemes, group key management is more suitable for wireless sensor network.
该文分析比较了各种密钥管理方案，认为组密钥管理更适合于无线传感器网络。
Combined with complete binary tree architecture, a new identity-based group key agreement protocol is proposed in this paper.
文中结合完全二叉树结构，提出了一种新的基于身份的群密钥协商协议。
First of all, this dissertation extensively studied the group key management algorithms based on key tree in secure multicast.
首先本文深入研究了安全组播中基于密钥树的组密钥管理算法。
Group key agreement scheme is more adaptable than group key distribution in DPG in which its membership can be frequently changed.
在群成员随时变动的动态对等群组中，群密钥协商比群密钥分配更适用。
By comparing and analyzing the strategy of group key management in existence, it provides an idea of the further study in this field.
通过对现有的组密钥管理策略进行对比分析，为该领域的进一步研究提供了思路。
A group key distribution scheme utilizing a polynomial expansion is proposed, which features in no traditional encryption and decryption.
提出了一种利用多项式展开的组密钥分配方案，其特点是不使用传统加密和解密。
Secure group Communication System has been an active research domain, in which the group key management scheme is the most challenging work.
安全群组通信的研究是一个十分活跃的研究领域，群组密钥管理机制的研究是其中最具有挑战性的工作。
It is impractical for commercial multicast assuming that all group members know the group key in traditional multicast key management schemes.
传统的组播密钥管理都假设所有合法组用户可以知道组密钥，这种假设对于商业组播是不现实的。
Based on tree and threshold idea Wang et al. proposed an efficient group key agreement protocol (TTS) and claimed that their protocol is secure.
基于树结构与门限的思想，王志伟等人提出了一个高效的组密钥协商协议(TTS协议)，并认为他们的协议是安全的。
The proposed group key establishment scheme reduces both the computational overhead and communication costs and has the high security and usability.
提出的组密钥建立方案有效地降低了组密钥建立过程的计算和通信开销，并具有较高的安全性和可用性。
There are three kind of key agreement protocols: two-party key agreement protocols, three-party key agreement protocols, group key agreement protocols.
根据参与者数目的不同，密钥协商协议分为两方密钥协商协议、三方密钥协商协议和组密钥协商协议。
Finally, this paper introduces methods of group key management for extremely large-scale network, which can enlarge the maximum supportable network size.
最后介绍在网络规模极大的情况下，可以采用的群密钥管理方法，它改进了方案可支持的网络规模。
In order to decrease the storage cost of group key distribution protocol, a secure group key distribute protocol based on the status key tree is proposed.
为了减少群组密钥分发协议的存储代价，提出了一种基于状态密钥树的群组密钥分发协议。
Group communication is its important communication method, in which a feasible and effective group key management mechanism is the key precondition for security.
组通信是其重要的通信方式之一，可行和有效的组密钥管理机制是保障组通信安全的关键前提。
The traditional group key management doesn't account for the difficulties caused by the characteristics of wireless mobile network, so it can't be applied directly.
传统域密钥管理方案缺乏考虑无线移动网络自身特点给域密钥管理带来的困难，很难直接适用。
Group rekey is triggered by the managers in the lower layer. The new group key is produced by the group manager and is distributed to all other managers except itself.
组密钥的更新由低层管理域触发，由子组管理者产生新的组密钥并发送给所有的管理域。
Group rekey is triggered by the managers in the lower layer. The new group key is produced by the group manager and is distributed to all other managers except itself.
组密钥的更新由低层管理域触发，由子组管理者产生新的组密钥并发送给所有的管理域。
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