An inclined tree-group key management scheme based on elliptic curve cryptosystem is presented in this paper, which needs to renew only several node keys to provide perfectsecrecy.
本文提出基于椭圆曲线密钥体制的斜树密钥管理方案，算法只需更新少量密钥就能满足系统的安全需求。
2
The new scheme provides implicit key authentication and perfect forward secrecy etc.
该方案提供了隐含密钥认证和完善前向保密等安全属性。
3
In order to achieve perfect forward and perfect backward secrecy, and to counteract cryptoanalysis, the group session keys should be rekeyed.