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PC-SIG Diskette Library (Disk #482)
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Information about “ENCODE AND DECODE”
ENCODE/DECODE gives you an efficient way to encrypt and
decrypt sensitive and company-private information. Protect spreadsheets
source code, wordprocessor documents, data files -- in fact any file at
all. If your data is valuable, secure it with ENCODE/DECODE.
File Descriptions:
ENCODE TXT Documentation in plain vanilla DOS text file form.
ENCODE DOC Documentation MS-WORD 3.0 form.
ELITE STY Style sheet if your printer has 12 pitch 10 point type.
NORMAL STY The style sheet used by all documentation.
PICA STY Style sheet if your printer cannot do 12 pitch type.
PIG STY Style sheet used to create the plain *.TXT documents.
DECIPHER COM Decipher executable.
DECIPHER PAS Decipher source.
DECODE COM Decode executable.
DECODE PAS Decode source.
DECRYPT COM Decrypt executable.
DECRYPT PAS Decrypt source.
ENCIPHER 65 Encipher executable -- short 65 char lines.
ENCIPHER COM Encipher executable -- normal 125 char lines.
ENCIPHER PAS Encipher source.
ENCODE 65 Encode executable -- short 65 char lines.
ENCODE COM Encode executable -- normal 125 char lines.
ENCODE PAS Encode source.
ENCRYPT 65 Encrypt executable -- short 65 char lines.
ENCRYPT COM Encrypt executable -- normal 125 char lines.
ENCRYPT PAS Encrypt executable.
MAKEKEY COM Makekey executable.
MAKEKEY PAS MakeKey source.
README TXT Introductory text file.
ENCODE.TXT
ENCODE DECODE FOR ELECTRONIC MAIL VERSION 2
PURPOSE
The computer programs "Encode" and "Decode" allow spreadsheets, pro-
grams, source code, word processor documents, data files (in fact any
file at all) to be sent via electronic mail (eg. Envoy, GTE Telemail,
SourceMail, MCI Mail, Telex, Western Union EasyLink) between MS-DOS
(ie. IBM PC compatible) computers with perfect integrity.
Without Encode/Decode word processing files lose their formatting
(underline, bold etc.) when they are sent via electronic mail. Docu-
ments with lots of blank lines in them often flood the Telenet packet
network resulting in "data lost" errors. Programs and spreadsheets
cannot be sent at all as the Electronic Mail systems cannot handle the
special characters in them. Teleprocessing programs often tack on ex-
tra characters at the beginning and end of documents that must be re-
moved manually. Static on the phone lines can garble the transmis-
sions with no warning.
Encode and Decode do not actually send the documents. Programs such
as Smart-Com and PC-Talk do this. Encode prepares a document for
sending by converting all the special characters in the document into
ordinary characters. The document is then sent via Envoy, Telemail,
Telex etc. At the other end, Decode converts the ordinary characters
back into the original special characters.
Encode also compresses the document and prepares it in special ways
for very efficient transmission. This means that the charges for
sending the document are less. For a simple word processing document,
the encoded form is shorter than the original document. Even in the
worst possible case the encoded document is never more than twice as
long as the original.
If any characters were garbled in transmission via Electronic Mail,
Decode would detect this and warn you that you must send the document
again.
There are also two systems for sending secret messages. One
(Encipher/Decipher) is quick and inexpensive and keeps the casual ob-
server from intercepting the message. The other (Encrypt Decrypt
MakeKey) is a cumbersome, but a theoretically uncrackable system.
Note that the commonly used DES government standard encryption algo-
rithm is in theory crackable.
Encrypt and Decrypt can also be used to encrypt files that are not
even going to be sent via electronic mail, but which must be stored in
an uncrackably secret form.
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ENCODE DECODE for Electronic Mail
It costs about $0.60 per 1000 characters to send a file by electronic
mail. Thus it is usually cheaper to send files by mailing a diskette
rather than by sending via electronic mail. Electronic mail is best
used for short files or when the files are needed immediately.
USING THE PROGRAMS
If you wish to send a file, you must first use ENCODE to prepare it
for sending, then send it using the standard electronic mail, then use
DECODE at the other end.
If you wish to send a confidential file you must first use ENCIPHER to
prepare it for sending, then send it using the standard electronic
mail, then use DECIPHER at the other end. Note that an amateur cryp-
tographer could crack the code if he intercepted the file or had a
copy of DECIPHER.
If you wish to send an absolutely top secret confidential file you
must first use MAKEKEY to prepare a secret key file. This file must
be sent ahead of time via courier to the recipient. The key file can
be sent by electronic mail (using ENCODE ENCIPHER or ENCRYPT) but then
you risk interception. Then when you wish to send a secret message
you must use ENCRYPT to prepare it for sending, then send it using the
standard electronic mail, then use DECRYPT at the other end. For ab-
solute uncrackability (even by the CIA and the KGB) the key file must
be used only once and it must be longer than the message encoded.
USING ENCODE TO SEND FILES
eg. ENCODE C:\SYS\MYPROG.COM C:\SCOM\MYPROG.TEL
This means encode file MYPROG.COM on disk C: in subdirectory \SYS and
create a file called MYPROG.TEL on disk C: in subdirectory \SCOM plac-
ing the encoding of MYPROG.COM in it.
Never use the same name for both files. ENCODE does not modify or
destroy the original file MYPROG.COM.
The file C:\SCOM\MYPROG.TEL can then be sent using the standard elec-
tronic mail. Don't send MYPROG.COM!!
USING DECODE TO RECEIVE FILES
eg. DECODE C:\SCOM\MYPROG.TEL C:\FASTSYS\MYPROG.COM
This means decode file MYPROG.TEL on disk C: in subdirectory \SCOM
that has just arrived via electronic mail and create a file called
MYPROG.COM on disk C: in subdirectory \FASTSYS placing the decoded
original contents into it.
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ENCODE DECODE for Electronic Mail
If the C:\FASTSYS\MYPROG.COM is left out, the program will fill it in
for you automatically with the name of the original file on the send-
ing system. This name (C:\SYS\MYPROG.COM) is embedded in the
MYPROG.TEL file that is sent.
Never use the same name for the two files. DECODE does not modify or
destroy the input file MYPROG.TEL.
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ENCODE DECODE for Electronic Mail
If DECODE Beeps and prints an error message that the transmission was
garbled, you have three choices:
1. Use the file as is knowing that it is slightly corrupted. Attempt
this only with word processing documents. Any *.WKS spreadsheets,
*.COM or *.EXE program files cannot be used even with the tiniest
corruption.
2. Receive the file over again and retry the DECODE. This will fix
the problem if the garbling occurred during the receive from the
Electronic Mail system, but it won't help if the garbling occurred
during the send to the Electronic Mail system.
3. Send the file over again, receive the file over again and retry the
DECODE.
USING ENCIPHER TO SEND CONFIDENTIAL FILES
eg. ENCIPHER C:\LETS\MYSTUFF.DOC C:\SCOM\MYSTUFF.TEL
This means encipher file MYSTUFF.DOC on disk C: in subdirectory \LETS
and create a file called MYSTUFF.TEL on disk C: in subdirectory \SCOM
placing an enciphering of MYSTUFF.DOC in it.
Never use the same name for both files. ENCIPHER does not modify or
destroy the original file MYSTUFF.DOC.
The file C:\SCOM\MYSTUFF.TEL can then be sent using the standard elec-
tronic mail. Don't send MYSTUFF.DOC!!
USING DECIPHER TO RECEIVE CONFIDENTIAL FILES
eg. DECIPHER C:\SCOM\MYSTUFF.TEL C:\MAIL\MYSTUFF.DOC
This means decipher file MYSTUFF.TEL on disk C: in subdirectory \SCOM
that has just arrived via electronic mail and create a file called
MYSTUFF.DOC on disk C: in subdirectory \MAIL placing the deciphered
original contents into it.
If the C:\MAIL\MYSTUFF.DOC is left out, the program will fill it in
for you automatically with the name of the original file on the send-
ing system. This name (C:\LETS\MYSTUFF.DOC) is embedded in the
MYSTUFF.TEL file that is sent.
Never use the same name for the two files. DECIPHER does not modify
or destroy the input file MYSTUFF.TEL.
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ENCODE DECODE for Electronic Mail
If DECIPHER Beeps and prints an error message that the transmission
was garbled, you have three choices:
1. Use the file as is knowing that it is slightly corrupted. Attempt
this only with word processing documents. Any *.WKS spreadsheets,
*.COM or *.EXE program files cannot be used even with the tiniest
corruption.
2. Receive the file over again and retry the DECIPHER. This will fix
the problem if the garbling occurred during the receive from the
Electronic Mail system, but it won't help if the garbling occurred
during the send to the Electronic Mail system.
3. Send the file over again, receive the file over again and retry the
DECIPHER.
USING MAKEKEY TO PREPARE A KEY TO SEND TOP SECRET FILES
eg. MAKEKEY C:\HIDE\MYKEY9.KEY
This creates a file of random numbers that can be used as a key for
encrypting. You will be prompted to type anything you want. You can
just keep hitting the space bar if you like. The program measures the
random time between keystrokes -- not the keystrokes themselves.
Hit Ctrl-Z when you have entered enough keystrokes. What is enough?
In practice 80 would be enough. But if you want to ensure the code is
totally theoretically uncrackable, hit more keystrokes than the length
of the file you plan to encrypt.
It is a boring task creating these random files. I jokingly once said
that the illegal drug industry would be more interested in Encrypt
than anyone else. They would need to set up cottage industries in
Mexico to produce the necessary random key files; hence the name "The
Mexican Peasant" algorithm.
The key file must be sent to the recipient ahead of time. It could be
sent via Electronic mail, but for complete security the key file
should be sent via secure courier. The key file can be re-used, but
for total security a fresh key file should be used for every message.
Copies of the key files must be kept secure. With copies of the key
files the messages can easily be decoded.
For less secure systems, any file at all can be used as a key file as
long as both the sender and recipient have a copy of it, and no one
else does.
USING ENCRYPT TO SEND TOP SECRET FILES
eg. ENCRYPT C:\HIDE\MYKEY9.KEY C:\LETS\MYSEC.DOC C:\SCOM\MYSEC.TEL
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ENCODE DECODE for Electronic Mail
This means use the secret key file MYKEY9.KEY on disc C: in subdirec-
tory \HIDE to encrypt MYSEC.DOC on disk C: in subdirectory \LETS and
create a file called MYSEC.TEL on disk C: in subdirectory \SCOM plac-
ing the secure encryption of MYSEC.DOC in it.
Never use the same name for any of the three files. ENCRYPT does not
modify or destroy the original file MYSEC.DOC.
The file C:\SCOM\MYSEC.TEL can then be sent using the standard elec-
tronic mail. Don't send MYSEC.DOC!!
USING DECRYPT TO RECEIVE CONFIDENTIAL FILES
eg. DECRYPT C:\HIDE\MYKEY9.KEY C:\SCOM\MYSEC.TEL C:\MAIL\MYSEC.DOC
This means use the secret key file MYKEY9.KEY on disc C: in subdirec-
tory \HIDE to decrypt file MYSEC.TEL on disk C: in subdirectory \SCOM
that has just arrived via electronic mail and create a file called
MYSEC.DOC on disk C: in subdirectory \MAIL placing the decrypted orig-
inal contents into it.
If the C:\MAIL\MYSEC.DOC is left out, the program will fill it in for
you automatically with the name of the original file on the sending
system. This name (C:\LETS\MYSEC.DOC) is embedded in the MYSEC.TEL
file that is sent.
Never use the same name for any of the three files. DECRYPT does not
modify or destroy the input file MYSEC.TEL.
If DECRYPT Beeps and prints an error message that the transmission was
garbled, you have three choices:
1. Use the file as is knowing that it is slightly corrupted. Attempt
this only with word processing documents. Any *.WKS spreadsheets,
*.COM or *.EXE program files cannot be used even with the tiniest
corruption.
2. Receive the file over again and retry the DECRYPT. This will fix
the problem if the garbling occurred during the receive from the
Electronic Mail system, but it won't help if the garbling occurred
during the send to the Electronic Mail system.
3. Send the file over again, receive the file over again and retry the
DECRYPT. The same key can be used over again with no danger.
EQUIPMENT REQUIRED
The programs work on MS DOS 2.00, 2.10, 3.00, 3.10 or 3.20. They
should also work on later versions when they become available. They
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ENCODE DECODE for Electronic Mail
will not work on DOS 1.10 because that version of DOS does not support
subdirectories.
The programs will run on any MS-DOS computer eg. IBM PC, IBM XT, IBM
AT, Ericsson, Compaq, Corona, Hewlett-Packard 110, Microcan, Dot etc.
If the computer cannot read 5 1/4" diskettes, the programs must be
copied to the non standard diskettes. This can be done by connecting
an IBM PC and the other computer back to back with a serial link (or
through the dial up network) and transferring the programs using the
XMODEM or KERMIT protocol. CPM versions are also available for the
underpriviledged.
The programs will run with monochrome, color or Hercules CRT con-
troller cards.
The programs require only 15K of RAM (above what DOS uses) to run.
No printer or modem is required.
INSTALLING THE PROGRAMS
Installing need be done only once by someone who understands the DOS
commands MD CD and COPY. From then on anyone can use the programs.
The *.COM files are the executable versions of the programs. The
*.PAS files are the source code written in Turbo Pascal version 3.0.
The *.DOC files are standard DOS text files that can be PRINTed. The
*.TXT files are Microsoft Word files.
You must make copies of the diskette, send them by courier, and then
install the programs on all the machines that will interchange files.
It is not possible to receive the programs themselves by electronic
mail without first having the DECODE program.
Presuming you use subdirectory \FASTSYS on the C: hard disc drive to
keep your most commonly used programs, and presuming the ENCODE
diskette is your floppy drive A: type
COPY A:*.COM C:\FASTSYS
Presuming you have no hard disc and you have a diskette in the A:
drive where your electronic mail software is and presuming the ENCODE
diskette is your floppy drive B: type
COPY B:*.COM A:
The file ENCODE.TXT containing this documentation can be massaged with
the Microsoft Word Processor. You can modify this documentation for
your own purposes or include it in your own documentation. The file
ENCODE.DOC is a standard DOS text file with this documentation in it
which can be printed with the MS-DOS command
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ENCODE DECODE for Electronic Mail
PRINT A:ENCODE.DOC
If your electronic mail system cannot handle lines 125 characters long
(Envoy and Telenet can handle up to 132 characters), then you can re-
place the programs with versions that produce lines only 65 characters
long by typing
COPY A:*.65 C:\FASTSYS\*.COM
or
COPY B:*.65 A:*.COM
It is theoretically possible to install the programs on a remote ma-
chine without first sending a diskette. The source code for DECODE
can be sent using standard electronic mail. At the remote site the
code can be compiled using the Turbo Pascal compiler version 3. Then
the rest of the files can be sent via ENCODE / DECODE.
NOTES FOR SOURCEMAIL USERS
SourceMail (the electronic mail system offered by The Source) inserts
-MORE- prompts into the messages as they are received. These look to
DECODE like part of the file (it is not very bright -- for all it
knows you are writing a document about MCI mail (like the document you
are reading now) and -MORE- truly is part of the file). To get around
this you must type NOCRT after the first -MORE- prompt appears
(immediately following the subject line of your mail) to turn the
-MORE- prompts off.
TECHNICAL DETAILS
This information is important only to people planning to modify the
programs.
Electronic mail systems cannot be trusted to pass control characters
(Tab Cr Lf FF etc) or characters with the high bit on (accented char-
acters). In addition they sometimes trim trailing blanks from lines,
or append them. It is very inefficient to send short lines to an
electronic mail system as each line usually forms a full packet even
if it consists of a single Cr. The file transfer programs often in-
sert additional printable characters before and after the file itself
because the computer operator must manually decide when to start and
stop capturing characters from the communications line to disk.
The brute force approach to solving this problem is to encode files in
hexadecimal before transmission using only the safe characters 0..9
A..F, inserting Cr-Lf sequences every 65 characters. The problem with
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ENCODE DECODE for Electronic Mail
this is that a word processing file is exactly twice as long as if it
were sent plain. This means it costs twice as much to send
The electronic mail system can be trusted only to handle the ASCII
characters chr$(33..126) vis. A..Z a..z 0..9 or punctuation but not
space. Our approach roughly is this, if the character is already safe
send it unmodified. If it is a control character chr$(1..31) we send
it as two safe characters ^A ^B ^chr$(c+64) etc. If it is a control
character with the high bit on ie. chr$(128..159) it is encoded as the
pair 'A 'B 'chr$(c-64) etc. If it is a regular character with a high
bit on ie. chr$(161..254) we encode it as the pair `A `B `chr$(c-128)
etc.
This means we have stolen some of the punctuation characters for use
as indicators. How then do we send a real ^ ' or ` and not have it
taken as an indicator? We steal yet another character the ! as lit-
eral next character so that ^ is coded as the pair !^ ' as !' etc.
What about ! itself? It is coded as !!.
In addition we note that text files often contain the string CrLf.
This would be encoded as a 4-character sequence ^M^J. This occurs so
often we use a single character abbreviation ; for it.
In addition text files often contain long strings of spaces or zeros
and binary files contain long strings of nulls and hex FFs. For exam-
ple, if a file contained 5 spaces in a row we compress the file by
sending two characters -- one indicating repeating spaces the > and
another indicating the fact there were five of them -- the #
(chr$(count+30)).
This scheme does not do that great a job compressing a single space or
a pair of spaces. So we code a single space as an & and a pair of
spaces as a <.
In a similar way 0's are encoded with 0 { and }. Nulls chr$(0) are
encoded with \ ~ #, and hex FFs (binary -1) Chr$(255) are encoded with
% [ ].
This leaves three characters falling between the cracks chr$(127)
which is encoded as the pair ^` and chr$(160) which is encoded as the
pair ^a and the period chr$(46) which is encoded as the pair ^b. Ear-
lier versions did not encode the period in any special way. This new
feature was added to bypass a bug in the Envoy NIO electronic mail
system.
For a simple word processing document, the encoded form is even
shorter than the original document. Even in the worst possible case
the encoded document is never more than twice as long as the original.
We then insert CrLfs every 125 characters. This breaks the document
into efficient long lines for sending. For maximum efficiency each
line should exactly fill one packet. Different Electronic mail sys-
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ENCODE DECODE for Electronic Mail
tems have different optimum line sizes, so this size can be modified
in the source code of ENCODE, ENCIPHER and ENCRYPT. DECODE, DECIPHER,
and DECRYPT work with any line length.
Find out the maximum length of a line that your Electronic mail system
can send. It will be 65, 80, 127, 132 or 255. Find this out by ex-
perimenting. If you do not want to bother, presume 65. For Envoy it
is 132. However the packets sent via the Telenet / Envoy gateway are
128 characters long. To allow for the CrLf and the space and the
space at the head of the line, the optimal size of line is 125 charac-
ters. If 125 is not suitable, modify the source code and recompile or
use the *.65 versions.
The output is preceded by the letters ^cENCODE ^cENCIPHER or ^cENCRYPT
to indicate the type. Following that is the filename from which the
file was encoded. Following that is a ^c. Then comes the encoded
file. Then come the two characters ^c to mark the end of the body of
the file. Then comes the 4 digit checksum. Then comes another ^c.
Every line except the first starts with a blank. This ensures that no
line of data will accidentally be interpreted as a command to the
electronic mail system. Envoy and Telemail for example treat any
lines starting with a dot as a command.
The checksum includes the words ENCODE, the file name, and most of the
^c's. The checksum does not include the CrLfs, the first ^c or the
checksum itself or the ^c after the checksum. The checksum is com-
puted by adding the codes of all the characters in the output file as
a 16 bit binary number ignoring overflow. The checksum consists of
the 4 low order decimal digits of this sum, padding with zeros if
necessary.
Encipher uses a very simple algorithm to encode the file. It simply
converts each character with chr$(159-c) after encoding in the stan-
dard way. A more complex algorithm would end up turning the safe
characters into unsafe ones and would thus require double the trans-
mission time. The algorithm is designed to keep the casual reader
out. Anyone with a copy of Decrypt or who is good at cryptograms can
easily break the code.
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ENCODE DECODE for Electronic Mail
Encrypt uses the only truly secure way of sending encrypted files. It
is cumbersome but perfectly secure. You must first prepare a key file
of random numbers -- for example the times between keystrokes accurate
to the microsecond while you type the Gettysburg address (created by
Makekey). This file of random numbers must be sent ahead of time by
secure courier to the recipient. It must NOT be sent electronically
unless you wish to take the risk of the key being intercepted. Then
the message to be sent is exclusive ORed with the key file of random
numbers. That message is then sent using the usual encode mechanism.
At the receiving end the message is first decoded in the usual way
then it is again exclusive ORed with the key file of random numbers,
which reconstructs the message.
For a theoretically uncrackable system, the file of random numbers can
only be used once and it must be at least as long as the message. In
practice even the CIA could not crack the code if the key file were up
to 3 times shorter than the message file. However they could crack
the code if the key file were used more than a few times.
FUTURES
Please pass along ideas for improvements or let me know how important
or unimportant the following features would be:
- interactive DECODE so that you get to see the default decoded file
name and then accept it or override it.
- super compression of files using Huffman encoding.
- compression of files by arranging that if the same file is sent more
than once, just the changes are sent. Generalizations of this where
compression uses a dictionary of common words and phrases.
- faster execution by programmatic file deblocking.
- DOS 1.1, UNIX or Apple MacIntosh versions.
- Source code in other languages eg. C, Forth, Assembler. On princi-
ple I refuse ever to write in Basic. An older less polished version
of the program exists in C.
- DES encryption standard.
- ability to encode many files at once with wild cards eg. ENCODE
S*.COM S*.TEL. S1.COM encodes to S1.TEL S2.COM encodes to S2.TEL.
- ability to combine many files into one file to send eg. ENCODE
S*.COM S*.EXE ALL.TEL would individually encode S1.COM S2.COM S1.EXE
and S2.EXE into a single file ALL.TEL.
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ENCODE DECODE for Electronic Mail
- inserting Envoy TO:, CC:, SUBJECT:, . SEND Y etc into the encoded
file, so that they need not be typed manually when the message is
sent. Ditto for other Email services eg. GTE Telemail, SourceMail,
MCI Mail, Telex, and Western Union EasyLink.
- Ability to reconstruct the original date and time of the source
file.
- Totally integrated package that encodes, dials, picks up mail, re-
sends garbled documents, and allows unattended operation.
- Public domain X.25 mini computer software to replace or augment the
electronic mail service bureau. The software would be optimized for
file rather than message transfer by presuming local intelligence in
the terminal. It would handle 8-bit transparent data with immediate
error retry on a line by line basis. It would also allow a file
transfer to pick up where it left off in case the connection were
broken. Any terminal with access to Datapac, Telenet or Tymnet via
300 or 1200 baud dialup or X.25 hard-wired link could exchange files
and messages.
- This is not pie in the sky. I, Roedy, have already written a pro-
prietary system, MEDICS, to allow BC physicians to automatically send
in their IBM PC based billings to a Prime minicomputer via Datapac.
I wrote another proprietary system, CSL Stock Charter, that keeps
stock portfolios up to date on the MacIntosh by automatically access-
ing a database via Datapac, Telenet, or Tymnet. I have already writ-
ten about 3000 screens of public domain Forth Code known as Abundance
to help charities track donors and volunteers. The time of large
public domain programs has come. Some of my work was written up in
the Public Domain special issue of Byte -- October 1986.
PUBLIC DOMAIN
The programs ENCODE, DECODE, ENCIPHER, DECIPHER, ENCRYPT, DECRYPT and
MAKEKEY are written in Turbo Pascal version 3.0. The programs, in
both source and object form, and the documentation are in the public
domain and may be used, copied, sold or modified without restriction
or credit. You may use them for any purpose except military.
VERSION HISTORY
Version 1.4 added a CrLf to the last line of an Encoded file to make
it easier to use Procomm.
Version 2.0 added special coding for the period to bypass bugs in
Envoy NIO electronic mail. It also added version messages. It is not
compatible with earlier versions. To send the new versions to the
field, you must encode/decode with the old versions.
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ENCODE DECODE for Electronic Mail
Please pass any comments or suggestions for improvement to the au-
thors:
Steve Cross or Roedy Green
Canadian Mind Products
#11 - 3856 Sunset Street
Burnaby, BC
Canada
V5G 1T3
(604) 435-2957
Envoy/BIX ID:ROEDY
\AB1\MODEM\ENCODE.DOC -13- last updated 1987 February 2
FILES482.TXT
Disk No 482
Program Title: ENCODE/DECODE
PC-SIG version 2.1
ENCODE/DECODE presents the user with a more efficient and less expensive
way to send information via electronic mail. ENCODE/ DECODE allows
speadsheets programs, source code, word processor documents, data files,
in fact any file at all, to be sent via electronic mail. This progam is
valuable in the fact that without it word processing files lose their
formatting when sent via electronic mail. Program is documented.
Usage: File Security.
Special Requirements: None.
How to Start: Type GO (press enter).
Suggested Registration: None.
File Descriptions:
ENCODE TXT Documentation in plain vanilla DOS Text file form.
ENCODE DOC Documentation MS-Word 3.0 form.
ELITE STY Style sheet if your printer has 12 pitch 10 point type.
NORMAL STY The style sheet used by all documentation.
PICA STY Style sheet if your printer cannot do 12 pitch type.
PIG STY Style sheet used to create the plain *.TXT documents.
DECIPHER COM Decipher executable.
DECIPHER PAS Decipher source.
DECODE COM Decode executable.
DECODE PAS Decode source.
DECRYPT COM Decrypt executable.
DECRYPT PAS Decrypt source.
ENCIPHER 65 Encipher executable - short 65 char lines.
ENCIPHER COM Encipher executable - normal 125 char lines.
ENCIPHER PAS Encipher source.
ENCODE 65 Encode executable - short 65 char lines.
ENCODE COM Encode executable- normal 125 char lines.
ENCODE PAS Encode source.
ENCRYPT 65 Encrypt executable - short 65 char lines.
ENCRYPT COM Encrypt executable - normal 125 char lines.
ENCRYPT PAS Encrypt executable.
MAKEKEY COM Makekey executable.
MAKEKEY PAS MakeKey source.
README TXT Introductory text file.
PC-SIG
1030D E Duane Avenue
Sunnyvale Ca. 94086
(408) 730-9291
(c) Copyright 1986,87,88 PC-SIG, Inc.
GO.TXT
╔═════════════════════════════════════════════════════════════════════════╗
║ <<<< Disk No 482 ENCODE/DECODE >>>> ║
╠═════════════════════════════════════════════════════════════════════════╣
║ To print the documentation, type: ║
║ COPY ENCODE.TXT PRN (press enter) ║
║ To run the program DECIPHER, type: ║
║ DECIPHER (press enter) ║
║ To run the program DECODE, type: ║
║ DECODE (press enter) ║
║ To run the program DECRYPT, type: ║
║ DECRYPT (press enter) ║
║ To run the program ENCIPHER, type: ║
║ ENCIPHER (press enter) ║
║ To run the program ENCODE, type: ║
║ ENCODE (press enter) ║
║ To run the program ENCRYPT, type: ║
║ ENCRYPT (press enter) ║
║ To run the program MAKEKEY, type: ║
║ MAKEKEY (press enter) ║
╚═════════════════════════════════════════════════════════════════════════╝
README.TXT
README.TXT
Public Domain ENCODE ENCIPHER ENCRYPT by
Roedy Green
Canadian Mind Products
#11 - 3856 Sunset Street
Burnaby BC Canada
V5G 1T3
(604) 435-2957
Microsoft Word version 3 Style sheets
copy PICA.STY NORMAL.STY
copy ELITE.STY NORMAL.STY
before you print your documentation
I strongly suggest tweaking the style sheets first to get best
results on your printer. If you don't have MS-Word, print
ENCODE.TXT instead.
ENCODE TXT Documentation in plain vanilla DOS Text file form
ENCODE DOC Documentation MS-Word 3.0 form
ELITE STY Style sheet if your printer has 12 pitch 10 point type
NORMAL STY The style sheet used by all documentation
PICA STY Style sheet if your printer cannot do 12 pitcth 10 point type
PIG STY Style sheet used to create the plain *.TXT documents
DECIPHER COM Decipher executable
DECIPHER PAS Decipher source
DECODE COM Decode executable
DECODE PAS Decode source
DECRYPT COM Decrypt executable
DECRYPT PAS Decrypt source
ENCIPHER 65 Encipher executable - short 65 char lines
ENCIPHER COM Encipher executable - normal 125 char lines
ENCIPHER PAS Encipher source
ENCODE 65 Encode executable - short 65 char lines
ENCODE COM Encode executable- normal 125 char lines
ENCODE PAS Encode source
ENCRYPT 65 Encrypt executable - short 65 char lines
ENCRYPT COM Encrypt executable - normal 125 char lines
ENCRYPT PAS Encrypt executable
MAKEKEY COM Makekey executable
MAKEKEY PAS MakeKey source
README TXT This document
Directory of PC-SIG Library Disk #0482
Volume in drive A has no label
Directory of A:\
DECIPHER COM 13443 2-02-87 8:29p
DECIPHER PAS 8682 2-02-87 9:02p
DECODE COM 13365 2-02-87 8:25p
DECODE PAS 8171 2-02-87 9:03p
DECRYPT COM 13880 2-02-87 8:26p
DECRYPT PAS 9488 2-02-87 9:03p
ELITE STY 1536 12-03-86 2:06p
ENCIPHER 65 13351 2-02-87 6:27p
ENCIPHER COM 13351 2-02-87 8:26p
ENCIPHER PAS 8615 2-02-87 9:02p
ENCODE 65 13289 2-02-87 6:27p
ENCODE COM 13289 2-02-87 8:25p
ENCODE DOC 26624 2-02-87 8:50p
ENCODE PAS 8324 2-02-87 9:03p
ENCODE TXT 29844 10-07-88 3:14p
ENCRYPT 65 13675 2-02-87 6:27p
ENCRYPT COM 13675 2-02-87 8:25p
ENCRYPT PAS 9432 2-02-87 9:02p
FILES482 TXT 1890 10-17-88 9:39a
GO BAT 38 10-10-88 9:00a
GO TXT 1541 10-10-88 8:57a
MAKEKEY COM 12245 2-02-87 8:26p
MAKEKEY PAS 3567 2-02-87 9:03p
NORMAL STY 1536 12-03-86 2:06p
PICA STY 1408 12-05-86 1:42p
PIG STY 1408 12-06-86 10:45p
README TXT 1595 2-02-87 6:41p
27 file(s) 257262 bytes
50176 bytes free