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文件的删除
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| 发表日期:2003-10-10 | 文件大小:145494 下载次数:1796 |
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源代码说明:
Paranoia dictates that sometimes when we want a file deleted,
we want it to stay deleted so that no one can remove our hard
disks and find any magnetic remnents of files we have created
and later deleted. Our government insists that three rewrites
of the file are sufficient to destroy the image. ZapFile
assumes the government standard is false and that it takes more
to accomplish a total erasure of the file. ZapFile rewrites the
file 100 times, saves it to disk each time, and finally deletes
it. If this file can be accessed it should contain only
chr(126) as readable characters. The original file is now
forever erased and a disk reader will find only '~' characters
on disk where the file used to be.. ′′
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