一种基于乐观方法的安全实时并发控制协议  

A Secure Real-time Concurrency Control Protocol Based on Optimistic

作　　者：肖迎元[1] 陈向阳[2] 刘小峰[3] 邓华锋[3] 

机构地区：[1]天津理工大学计算机科学与工程系,天津300191 [2]武汉工程大学计算机科学与工程系,武汉430073 [3]华中科技大学计算机学院,武汉430074

出　　处：《计算机科学》2007年第4期114-115,128,共3页Computer Science

摘　　要：实时数据库通常应用在一些安全关键类应用中,如电子商务、股票交易、军事指挥系统等。在这样一些应用中,实时数据库系统需同时满足两方面的需求:确保数据安全和尽可能减低实时事务错过截止期的比率。然而,通常这两方面需求是相互冲突的,满足一方面是以牺牲另一方面为代价。本文提出了一种基于乐观方法的安全实时并发控制协议,该协议将安全约束整合到实时乐观并发控制协议中,并能根据应用的需求在安全性和实时性方面进行了适当的折中。性能测试结果显示,该协议在确保数据安全的同时并未明显地降低实时性能。Real-time database are usually needed in some safety-critical applications such as e-commerce, stock trading systems and military systems. In these applications, real-time database systems must simultaneously satisfy two requirements in guaranteeing data security and minimizing the missing deadlines ratio of transactions. However, these two requirements can conflict with each other and to achieve one requirement is to sacrifice the other. This paper presents a secure real-time concurrency control protocol based on optimistic method. The concurrency control protocol incorporates security constraints in a real-time optimistic concurrency control protocol, and can make a suitable tradeoff between security and real-time requirements according to the needs of applications. Performance tests show that the concurrency control protocol achieves data security without sacrificing real-time performance significantly.

关 键 词：实时数据库 并发控制 安全 隐通道 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]