Aiming at the self-beneficial attack problem in layered multicast protocol, a secure layered multicast protocol is presented. The congestion state related access control algorithm is designed.
针对分层组播协议存在的自利型攻击问题，提出了一种安全分层组播协议，设计了基于拥塞状态的访问控制算法。
Combining security of SSL protocol and find-grained access control, SSL VPN(Secure Socket Layer Virtual Private Netwrok) does well in resolving this problem.
结合SSL的加密特性和细粒度的访问控制，很好地解决了上述问题。
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