论文部分内容阅读
在VAX系列机多用户系统中,在一般用户级,有时做了一个很重要的文件,而不想特权用户读出;或者反过来说,系统管理员为了不使某一重要文件泄漏,这里都有一个对文件加密的问题。本文介绍利用FORTRAN 77语言编写的加密软件,在VAX/VMS系统上运行,能对源程序加密和对其密文解密。程序框图如下,运行此程序,首先要输入欲加密的文件名,屏幕上很快显示出文件总行数,接着提示要加密
In the VAX series of multi-user system, at the general user level, sometimes do a very important document, but do not want to privileged users to read out; or conversely, the system administrator in order not to leak an important file, there are A file encryption problem. This article describes the use of FORTRAN 77 language encryption software written on the VAX / VMS system, the source code can be encrypted and its ciphertext decryption. The block diagram is as follows, run this program, you must first enter the file name you want to encrypt, the screen quickly shows the total number of files, and then prompt to be encrypted