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echo: 80xxx
to: BRIAN MCCLOUD
from: CAMERON CLARK
date: 1997-06-06 17:47:00
subject: Re: Copy Protect (naive quest

BM> N.>so I was wondering if anybody has a code/program to make a floppy
BM> N.>non "copyable".
BM> N.>I've already tried to write some formatters with funct. 05 int13h but
BM> N.>I got no result, you can still use the simple "diskcopy" to copy it.
BM> 
BM> N.>Any hint ?
    I don't know how diskcopy works, but you might think about low level
    ideas to help gard your disk. You might write a "signature" in an
    unused sector - You might require certain files to start at specific
    locations on the disk. You may take a "picture" of the file allocation
    table and store it in a file (making sure to allow for this new file
    to be present but not reported in the FAT picture). Just remember, if
    you can hake your own system: someone else can too.
    If you take a FAT picture, you might want to encrypt it based upon 
    a portion of the FAT (for a semi-original key) and a separate key
    not retreivable from any portion of the disk.
    Would any of these ideas get past a diskcopy?
--- GEcho 1.00
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