By searching a key word or taking a photo, people can immediately find out which group their waste belongs to.
通过搜索关键词或是拍照，人们立刻就能知道该垃圾属于哪一类。
The selection of a group in the preceding panel displays key performance indicators about this group
在先前的面板中选择一个组，该面板将显示关于该组的关键性能指示器
And although they come from a movement that spurns individual leadership, preferring group decision-making, key figures have stepped up to drive the peace process forward.
尽管他们来自一个排斥个体领导，倾向于集体决策的组织，但其关键人物已经在加速推进和平进程。
Scientists have pinpointed a key group of cells that sends itch-alerts to the brain.
科学家们已经明确找到将抓痒提醒信号传输到大脑的一组关键细胞。
Whether you're training alone or with a group, the key is to start slowly.
不管你是一个人还是跟着大家一起练习，重点是要慢。
This raises the problem of group key management.
这导致了群组密钥管理问题。
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。
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。
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。
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。
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。
Because of the importance and urgency of security to multicast, this thesis investigates two key issues, i. e. authentication and group key management, of multicast security.
安全是多播研究中急需解决的问题。本文对多播安全中认证和组密钥管理这两个关键问题进行了研究。
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。
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。
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。
At present, group key management mainly divided into goup key distribution and group key agreement, both of them have their own character and can be used in different applications.
目前已有的组密钥管理协议主要包括组密钥分配协议和组密钥协商协议，总体来说，他们各有优缺点，适用于不同的情况。
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。
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。
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。
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。
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。
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。
A new group key agreement protocol was proposed in this paper. In this protocol, the participants could verify the honesty of other participants by a series of algorithms.
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。
Firstly, a composite method of part agreement and part distribution is adopted to establishment the cluster key, then, a full agreement method is adopted to establishment the group key.
该方案首先采用部分协商和部分分发相结合的方式建立簇密钥，然后采用完全协商的方式来建立组密钥。
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。
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。
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。
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。
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。
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