Re: The Most Profound Distillation of the Feedack from Modern Cyptography.

On 9/26/2011 11:46 AM, Paulo Marques wrote:


Can you point me to the core encryption / decryption files?

Looking at the code in

http://adacrypt.com/downloads/Vector%20Cipher_2%20Program.zip

"REAL_TIME_ENCRYPTION_PROGRAM_MARK_2.adb"

seems to contain the algorithm. After all the
initialization, the loop from lines 720 to 759 actually does the encryption. The code reads one character from input at
line 740, and lines 741 through 759 encrypt it into 3 numbers,
which are then output.

The algorithm has a lot of global state, which is updated after
processing each input character. The global state is all
in global variables; there is no use of objects or structures,
which makes the code difficult to follow. What's going on doesn't
seem to be all that complex, and if rewritten clearly would probably
be about 200-300 lines of code.

I haven't tried to figure out what the thing is doing cryptographically,
but at least that's where it's being done.

John Nagle
.

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