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1994-11-06
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2KB
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35 lines
FFCR
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FFCRis a utility to create a "code-key" file. The code-key file is a set
of random integers, in the range of 0 to 255, that define the "shift" of
each character in the file to be encoded, and the reverse shift of each
character in the encoded file, in order for it to be decoded. FFCR is a
part of the shareware *ONETIME* file security system.
To invoke FFCR, type: ffcr filename, where filename is the name of the file
to be encoded. FFCR will create a file named CODE.KEY that is of greater
length, in bytes, than the file to be encoded. FFCR will usually be invoked
from the batch file FENCODE, but can be used as a stand-alone utility.
FFCR is used to encode and decode both binary and text files. Use the
companion utility FCR to generate key-files for more encoding only text
files for hard-copy or fax output.
Note that the length of the key-file will be equal to or greater than that
of the file to be encoded. Additionally, each particular key-file should be
used once only, otherwise the security of the encryption process is
compromised.
The C source for FFCR is included. Use and modification of source requires
the written permission of the author, which will very likely be granted on
request.
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M\Cooper
3425 Chestnut Ridge Rd.
Grantsville, MD 21536-9801
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Email: thegrendel@aol.com