IBM PCXT／286软盘防拷加密一种有效方法

本文介绍了一种软盘防拷贝加密新方法,其基本原理是在IBM PC XT/286挡次微机的高密驱动器上,异常格式化低密或高密软盘并在这特殊磁道内写入密码,用一判别程序判断是否为原始磁盘,且将判别程序融汇于被保护的可执行程序中,以达到保护软盘上软件不可被拷贝目的。由于该方法与一般方法相比较有很大改进,故用它们加过密的磁盘即使用Robert T M和FrankKlein两人研制的最新版本的COPYWRIT也不可进行拷贝。

An Efficient Method of Protecting Floppy Disk in IBM PC XT/286

Ordinary methods can protect computer software from being copied,but most of them are invalid by using the high level copy program, Byimproving one of the methods, we find the newly developed method isvery effective in protecting software from being copied. Abnomallyformatting a track on a low density or high density diskette in the IBMPC XT/286 high density driver, and writing some data (or secret codes)into the specialized track, we bave designed a program that can tell theoriginal diskette from copied diskettes, and the program is inserted intothe protected executable program. In this way, we have processed manydiskettes, and found that even if the new version COPYWRIT is used,the original floppy disks are still safe -- not to be copied.