对用于数据库保密的随机干扰法的研究

本文旨在ＦＯＸＢＡＳＥ语言环境下，实现用于数据库保密的随机干扰．文中提出了一种快速和不常驻内存的（伪）随机数的生成方法，给出了随机干扰量的算法，并讨论了干扰模块的设计，所设计的干扰模块具有“辩认出明显攻击意图”之后能自动加大干扰量的功能．经实例验证，本文提出的实现随机干扰的方法是可行的和有效的．

STIDY ON RANDOM PERTURBATION MEHTOD USED FOR DATABASE SECURITY

The goal of this paper is to implement random perturhtion used for databse security in theFOXBASE environment. The peper presents a methed of rapidly creating(pseudo)randomnumbers without oceupying resident memory,intreduces an algorithm to create the random per-turbations and discusses the design problems of perturbation medule.The designed medule hasa function to increase the perturbation automatically when a distinct attempt of attack has beendiscovered.By using some real databases as verifying examples,the paper shows that theperturbation medule established is feasible and available.