The SOS - System Homepage

The Algorithm BC1 (Binary Comparision)

BC1 works on the basis of a binary comparision. That is if binary numbers are equal output 0 else 1. And this process is reversible.

10101000 11111011
01010011 10101000
----------- -----------
11111011 01010011

BC1 encrypts four chars of the data at once. The comparision is as followed ( one number represents one char) The example uses a 6 chars long password.

Data ->	1234
Key ->	1234
	2345
	3456
	4561
	5612
	6123

Every times four new chars are to be encrypted the last bit of the password is shifted to the beginning.

Information

The problem, which stands behind this program is the following: There must be a possibility to secure online *.htm - files without CGI-BIN Skripts.
This is easy with S.imple O.nline S.ecurity:
Encrypt the file you want to secure with SOS.exe. What you get is the encrypted file, which can be easily opened and decrypted by an javascript 1.2 capable Browser. Just open the file, type in your password and you can read the file again.

News

28.8.1999
SOS 1.2 has been released.
Changes from 1.0 to 1.2:
- This version uses an algorithm similiar to RC4.
- The -w switch is no longer necessary.
- Improved output routine.

10.6.1999
The Site is now Cross-Browser compatible, was much work....
Trying to get some pro´s to test the encryption

19.5.1999
SOS won a prize at the Prix Ars Electronica Contest in the U-19 category (http://prixars.orf.at) hehe proud of that..;-)

25.4.1999
The Site is the first time up

Future Projects

The next thing I want to finish is a javascript-decryption-status indicator. Should be ready in the next few days.

I´m looking forward to have the SOS - System once with some famous Algorithms like RC4, RC5, Blowfish,...
perhaps there will also come a german version of the proggie once...we gonna see

Test Pages

Here I have placed some pages for you to to test.

SOS 1.2

test.htm	Test-File
crypt.htm	test.htm encrypted with the password ABCDEFG
crack.htm	It`s your task to find the pass for this page

SOS 1.0

test.htm	Test-File
crypt.htm	test.htm encrypted with the password SIMPLE
crack.htm	It`s your task to find the pass for this page

xxxx

Information
The C - Code
The Algorithm BC1
Future Projects
Test Pages
Links

Send mail with questions, complaints or comments to: auwe@gmx.net
(UIN: 11842040)
Site made by auWE, the algorythm BC1 and the name S.O.S. have my copyright.

sos.c	The Sos-Source Code in ANSI-C
sos.exe	The executeable SOS-Sytem

sos.c	The Sos-Source Code in ANSI-C
sos.exe	The executeable SOS-Sytem