For those who have a good SA and MK.

You put the SA in a wafer card and with the season interface, you log command CAF0 and CA18 (with nano command EF).

Then with ViaDecrypt :
- you click on CAF0
- you initialise the hash buffer with the SA
- you initialise the command and data with the data of log
- you analyse CAF0
- you click on CA18
- you initalise the hash buffer with the calculated hash from analyse of CAF0
- you initialise the command and data with the data of log
- you analyse CA18, i must have 'hash OK'
- You put a CW decipher to the wafer card.

You can found ViaDecrypt here :
http://server2048.virtualave.net/satvejledning/ViaDecrypt.zip 
password : freeseca