安全分布式数据库系统中，常会出现信息不一致现象，由此产生推理通道。
In a secure distributed database system, information inconsistency often exists, thus gives rise to inference channel.
计算机系统和网络的安全是分布式数据库系统安全的基础。
Computer system and network security are basis of security of distributed database system.
分布式数据库安全的核心技术是用户身份验证和访问控制。
The essential security technologies of the distributed database are user authentication and access control.
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