Stealth PGP and Stegonagraphy (Summary)
Sergey Goldgaber
sergey at delbruck.pharm.sunysb.edu
Thu Feb 24 04:12:45 PST 1994
In order to hide a Stealth PGP (or equivalent) encrypted "noise" file
effectively one may follow the steps outlined below:
1 Embed it in "structured garbage" such as is
present normally on the deleted portions of the
disk. This can be accomplished by using a
stegonagraphy program or by splitting the file
into small segments and scattering them among
"structured garbage".
2 Write the resulting "structured garbage"/noise
combination directly to disk. This can be
accomplished by using a normal disk-sector
editor utility.
3 Keep track of the exact location and size of the
file if you want to retrieve it later. Keep
this information secure.
4 Modify the FAT (or equivalent) to mark the
sectors you've written to as "FREE", "BAD", or
"DELETED" (if necessary).
In order to retrieve and reconstruct one's file simply reverse
steps 2 and 1.
For a more detailed discussion of the above method, see the associated
message, entitled "Stealth PGP and Stegonagraphy (LONG)".
Sergey
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