针对数字电视有条件接收系统中的密钥分配，提出了一种基于椭圆曲线密码的分层访问控制密钥分配方案。
A key distribution scheme based on elliptic curve cryptography for Conditional Access System (cas) in Digital TV broadcast is proposed.
另一方面解决了停靠站中资源的分层次访问控制问题。
On the other hand, it solves the work position resource graded access control.
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。
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.
针对移动数据访问系统中事务处理的并发控制和数据访问问题，提供了一种分层的并发控制算法。
Focusing on the problems of concurrent control and data availability exists in transaction processing in mobile data access system, this paper proposes a new hierarchical concurrent control algorithm.
针对移动数据访问系统中事务处理的并发控制和数据访问问题，提供了一种分层的并发控制算法。
Focusing on the problems of concurrent control and data availability exists in transaction processing in mobile data access system, this paper proposes a new hierarchical concurrent control algorithm.
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