研究了安全多方计算的一个特例——组密钥协商。
The group key agreement has been discussed as a special case of secure multi-party computation.
该方案具有如下特点：（1）协议仅需要两轮交互，就可以实现组密钥协商；
This scheme is characterized by the following properties:(1) Participants only need two-round communications to get the group key;
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。
There are three kind of key agreement protocols: two-party key agreement protocols, three-party key agreement protocols, group key agreement protocols.
基于该密钥管理模型的算法包含了密钥的生成、组密钥协商、密钥更新、节点加入处理和退出处理等子算法。
The key management algorithm based on the new scheme includes several sub algorithms, such as key generation, group key agreement, key update, nodes joining operation and nodes existing operation.
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。
Based on tree and threshold idea Wang et al. proposed an efficient group key agreement protocol (TTS) and claimed that their protocol is secure.
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。
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.
此时谈判的每一方都是一个组，因此需要为多个组一次协商出所有的组密钥。
The other one can not only generates secret session key for one group but also generates keys for subgroups that exist in this group.
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。
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.
提出一个应用椭圆曲线密码体制进行密钥协商而在基于身份的公钥系统内进行组通信的全新安全组播方案。
In this paper, we propose a novel secure multicast scheme with key agreement based on Elliptic Curve Cryptosystem and group communication inside Identity-based Public key Cryptography system.
提出一个应用椭圆曲线密码体制进行密钥协商而在基于身份的公钥系统内进行组通信的全新安全组播方案。
In this paper, we propose a novel secure multicast scheme with key agreement based on Elliptic Curve Cryptosystem and group communication inside Identity-based Public key Cryptography system.
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