Force 2011 Key Information
The key on the Megatouch Force 2011 holds 1024 bytes of data. It holds configuration data and must be encrypted properly with a symmetric key that is generated from the Dallas key's serial number. This data is XOR encrypted in blocks of 6 bytes. The encryption key is 6 bytes. It is an XOR of 6 bytes of the serial number with 6 bytes of "magic data" (4e 56 49 36 3d 39). To determine the encryption key used for any Dallas Key, perform the following steps.
| Step Number | Description | Example |
|---|---|---|
| 1 | Write the key serial number | E0 00 40 00 00 10 00 8C |
| 2 | Remove the first and last byte | 00 40 00 00 10 00 |
| 3 | Write down the magic number | 4e 56 49 36 3d 39 |
| 4 | XOR the values from step 2 and 3 | 4e 16 49 36 2d 39 |
| The results of the XOR in step 4 are your encryption key | 4e 16 49 36 2d 39 | |
Encrypting/decrypting the data
The plain text configuration data is encrypted via XOR in 6 byte blocks with the key generated in the step above. The one exception is that bytes 18-21 should be encrypted separately and the with only the first 4 bytes of the key.You will know if you decrypted the key correctly if you see the following ASCII strings in the decrypted key data at some point (assuming a US region key)
SA360301
USA-STD
us.accessmerit.com
meritgames.com/us-portal.htm
