基于多版本的多级安全并发控制机制的研究

Multilevel secure concurrency control based on multiversion

在多级安全数据库系统中,如果采用传统的并发控制机制,则通过多级事务的协作可以很容易的创建隐通道,因此我们必须研究适合于多级安全数据库的并发控制机制。本文提出了一个基于多版本的安全的并发控制机制,它能阻止隐通道的创建而不会导致检索异常和高级事务的饿死,同时还能提供一个多级事务的可串行化调度。

Concurrency control is important for multilevel secure databases because a covert channel can be easily created through collaboration of multilevel transactions in most traditional concurrency control mechanisms. We, in this paper, propose a secure multiversion concurrency control mechanism. This method prevents the creation of covert channel without retrieval anomaly and starvation of high transactions while providing serializable schedules for multilevel transactions.