I am going to write a private server for the game: "ROSE Online"
I need to obtain information about how to decrypt/encrypt packets.

I do know that the program NoXCeeD Pro (A proxy for iROSE) uses the encryption.

You can download it here:
http://fabdavid.free.fr/divers/rose/logiciels/?M=A
("http://fabdavid.free.fr/divers/rose/logiciels/?M=A
")

Already discovred:
004039C0 // Crypt table
00403778 // Crypt table
004024a2 // Probably, alot of XOR functions. (Decrypt)
00402759 // Probably, alot of XOR functions. (Encrypt)
00408e90 // Switch tables
00425400 // Strange section
00405367 // Connecting

Can you guys help me out, explain how I can find it or find it for me?

Thanks alot.

> am going to write a private server for the game: "ROSE Online"
why not write something useful instead?

> I need to obtain information about how to decrypt/encrypt packets.
1) find where the packets are being sent/recvd, 2) analyse the following code that processes the packets