
      Reference Manual for S-Mail Vers.: 1.30 + 1.40 Dec. 1998 
            File Encryption/Decryption and Pack Program

                        Copyright 1998 by
                           G. Steeger 
                             SSD Ltd. 
                          Nassau, Bahamas
                           +1 954-252-4061
                       Email ssd@batelnet.bs

The contents of this floppy disk and the accompanying documentation (together
with the program) are protected according to copyright laws. SSD Ltd. 
reserves all rights to these programs or the individual parts of mechanical
or electronic duplication, the right to let, lease, or hire out the data, the
right to change the program, and further the right to load and adapt the
program in electronic systems (for example data network). Any distribution or
transmission of this program or their use on several computers must be
authorized beforehand in writing by SSD Ltd..
  


                             Disclaimer

The program have been carefully checked. A guarantee that the program is 
either complete, correct or free from mistakes cannot, however, be given.    
Anyone using this software assumes all risks as to the quality and
performance of the software.  SSD Ltd. disclaims all liability for any
special, consequential, direct or indirect damages due to either proper or
improper use of the program.


                          Table of Contents

            Introduction  - - - - - - - - - - - - - - 1
            System Requirements - - - - - - - - - - - 2
            Prior Versions  - - - - - - - - - - - - - 3
 
            The Encryption/Decryption Section - - - - 4
            The Pack Section  - - - - - - - - - - - - 5  
 
            Last Minute Changes - - - - - - - - - - - 6
            
    
                                                                 
                            Introduction


What is S-Mail?
S-Mail is a program which encrypts, decrypts and pack a message in a EXE
file. This created new Program (EXE-File) will be transported via E-Mail
File Attachment. Whoever is the unauthorized person/office who wants 
to steal a message, first they have to know that it is a message. Use S-Mail 
as a  "Trojan Horse".
In the whole world you cannot get a disassembler for PowerBasic written 
Code. In the case there is a suspicion that the normal running program 
contents a very secret mail, first they have to disassemble the executable
file (which is not possible, because only Bob Zale, the founder of Power Basic
has a disassembler). The next step would be to decrypt the message. If you
want to know, how secure the encryption algorithm is, read the Encryption/
Decryption section of this readme file.  
   
 
                         System Requirements

Operating System:           DOS 5.0 or higher
                            Windows 3.11 or Windows95 or Windows98
Hardware:                   IBM PC or compatible
                            486 or higher (better Pentium)
Mouse:                      Microsoft Mouse or compatible
Video:                      VGA or higher 
Drives:                     1 Floppy drive 1,44 MB 3.5"
                            Harddrive with minimum 1 MB free space
Memory:                     615 KB free Memory 
                            optional 1 MB EMS (to swap the windows
                            into EMS instead of TMP file on HD
   
  

                            Prior Versions
Files encrypted with Version 1.30 CANNOT be decrypted with Version 1.40


                   Encryption/Decryption of S-Mail

For this program, the toughest known encryption alogorithm in this world
are used in series to encrypt the files. 
After encryption, everything is changed; the characters are substituted, the file size is changed. There is absoltely no way the author can help you, if you forget or lose the key. 
Maybe nothing is unbreakable but these files are virtually unbreakable in the same sense that RC4, RSA or IDEA encrypted files are unbreakable. Dont forget, S-Mail use more than one encryption method. 


The Pack Section

S-Mail was created for serious business use. This means that it doesnt
matter if you send letters to the recipient with this program, or you send bills, in all cases your file size is normally not bigger than 25000 Bytes.  It is very important to look for a good relationship 
between the code size of the running program and the code size of the message. It is not recommended to hide a picture file with the size of 
392000 Bytes in a program, which only shows and calculates the Celsius to the Fahrenheit temperature. 

  
Last minute changes

Before you leave S-Mail, you are able to decide which Windows application
should be started in order e.g. to open the decrypted file with the Notepad or to send the carrier file via email as a file attachment.
The program intends to run the following applications:
C:\Progra~1\Window~1\Exchchng32.exe
C:\Progra~1\Access~1\Wordpad.exe
C:\Windows\Explorer.exe

If S-Mail is not able to start the desired software, it looks in a 
file with the name: "app.cfg"
Open the file and you will find the following parameters:
email=C:\Progra~1\Window~1\Exchange32.exe
explorer=C:\windows\explorer.exe
docrd=c:\Progra~1\Access~1\Wordpad.exe

Feel free to change the path and program name(s) but DO NOT change:
email=
explorer=
docrd= 




 


