基于欧拉定理的文件保护方案

A File Protection Scheme Based on Eulers Theorem

一、引言 建立在单机单用户环境下的信息系统,其信息保护比较容易实现,在分时多用环境下,其信息保护的实现就相对复杂一些,而在网络共享、集中/分布式环境下,其信息保护涉及的范围广。

This paper proposes a new mechanism for access control based upon Euler' s theorem. With this mechanism,once access privileges of object are assigned to subjects,then the locks and keys, corresponding to the objects and subjects, respectively, can be decided automaticaly. And when an access attempt is made,the subject access right upon an object c:an attained by simple cal-culation with his key and its lock without retrieving any table. So it is a reasonable access control method.