存储介质信息消除技术及应用研究

Information Cancellation of Storage Media and Application

在Windows中,如果用常规的办法删除一个文件,Windows首先会把文件放入回收站,清空回收站后,操作系统也不会真正清除文件的数据,而只是把文件名称的第一个字母改成一个特殊字符,然后把该文件占用的簇标记为空闲状态,但文件包含的数据仍在磁盘上,下次将新的文件保存到磁盘时,这些簇可能被新的文件使用,从而覆盖原来的数据。

In Windows,if the conventional way is used for file deletion,Windows would first put the file into the recycle bin.In the empty of recycle bin,the operating system does not really remove the file data,but only changes the first letter of the file name into a special character,and then marks the clusters occupied by this file as idle state,and however,the data contained in the file is still on the disk.Next time,when the new file is stored on the disk,these clusters may be used by the new file,thus overwriting the original data.