I would apreciate all answers, speculation, etc

Well...

Data:

>>we have an 8 digit key
>>we have to get an 8 digit serial that belongs to the key

>>example: the key: RXYW3R55 has the serial (one of them): 4MS2JB9A

>>the generation of the serials is somehow done by the string:
NAX8B9TY3ZCRQF2GSWVH4J7EDK5LM6PU

Clues:

>>as i said a key may have more than one serial, but i think that don't mind right now(does it?)

>>as we can see in the example the last 2 digits of the key are the same (5), but in the serial theyīre not (9 and A). so a single alfabet comparison won't work, maybe a multiple table like i did once with 8 strings (one for each digit) taking the example as a start point(something like: 1st digit R equals 4; 2nd digit X equals M;...and so on)

>>the generation string gave above contains the characters for the key, the key can only have 8 among those characters. and as you can see there arenīt any I;O;1;0; so neither the alfabet or the ten decimal digits are complete (wich makes dificult the making of the tables i mentioned)


So...does anyone can figure out who the serials are made?
if yes say how.

you can try to guess the serial for the key: AGYQTULM
report it to me and then i can tell if your solution is right or wrong

good luck

Damn, people have become quite creative trying to find loop-holes in the FAQ rules and concealing their crack requests lately...

How about tracing the damned app?

LoL

LoL...
yeah...sorry about that
I'll try to trace it, but there are people who like beating challenges anyway

But attacking an unknown cryptosystem with a single ciphertext is pretty futile...

no...i know now two sets of keys...so itīs more easy (although i didnīt get to it yet )
with the generation key (NAX8B9TY3ZCRQF2GSWVH4J7EDK5LM6PU)
and these two matches:
(RXYW3R55 <-> 4MS2JB9A)
(UWW4Y6ZG <-> NGTR5V74)

I think it isn't impossible to check it out just with pencil and paper (thus a little tracing would speed up the process, no doubt about it.)( i'm almost sure this cryptosystem is very basic so time is all we need )

The generation key (NAX8B9TY3ZCRQF2GSWVH4J7EDK5LM6PU) seems to be a MD5 string generated with the other informations you've post because all MD5 code have a length of 32 and it is for your example. Perhaps it's a way to search an answer.

bye bye
yousky

While the string is 32 bytes long, it's almost certainly NOT an MD5. The upper two bits are all zeros. There's a 1/2^64 = 1 in 10 quintillion chance of that happening by accident.