there is a challenge on some other forum(my servers) where a piece of code is given and we have to decrypt it.

i have tried all day but cannot . i thought u guys might help me out

the encrypted code is:

keywords:

Code one=EMACHINES
Code two=COMPUTER


the reason this challenge is so difficult is that he has used an encrypter which encrypts using 2 codes.

i asked for some hints and he gave me this:

to think now it would be a piece of cake, but no i have been searching google all day, with no help.

think u guys can help me out

Hmm..I might have a clue about the way of encryption. I don't know the name of it but a classmate did a project on encryption and he teached me this method.
You start with a word like:
HELLO

Then you choose a codeword (random) for encryption, let's say: AID

Now, you take the codeword AID and count each letter, this means that each letter has a number corresponding to where in the alfabet the letter is: A=1, B=2, C=3....Z=26. This means that AID = 194

Next you lay down the word AID on the word HELLO:
H > A
E > I
L > D
L > A (here you start from the beginning again because the word AID is shorter then HELLO)
O > I

Now replace AID with the numbers:
H > 1
E > 9
L > 4
L > 1 (here you start from the beginning again because the word AID is shorter then HELLO)
O > 9

The codenumber next to each letter is the number of letters a letter needs to move forwards or backwards in the alfabet, in this example forwards:
H becomes 1 further = I
E becomes 9 further = N
L becomes 4 further = P
L becomes 1 further = M
O becomes 9 further = X

HELLO has turned into INPMX using the codeword AID

You can take the encrypted word INPMX and use it as beginword for another coding as the guy on the other forum did!

I'll come back to you with possible answers somewhere today or tomorrow!

Owh wait, ask this guy if I've found the right way of coding because I don't know wich of the codes he had used first, Code one or Code two...

Robin

thx robman

bit the encrypted message contains case sensitive letters.

also he used both of the codes not just one.

if u look at the hint he says that he has done it using a freeware and serach for decrypter encrypter

Well, using 2 codes just means that the encrypted word from the first encryptionprocess becomes the beginword for the next encryptionprocess.

I don't think that the case sensitive letters make any difference...

Robin