Newtec AZ110 User Manual page 89

Features
8.3.2.3 Key Sizes
The key management layer for AES is defined to work with two key sizes: 128 bits
for maximum security and 64 bits for meeting exportation restrictions in some
countries - the 64 bit keys have a randomness of 56 bits to fully meet exportation
restrictions. The last byte of the key is not used.
It is possible that the security mode on your modulator is restricted in the factory to
use 64-bit keys only. In that case, you cannot switch to 128-bit key mode.
AZ110 >> Unit >> Control >> AES
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Figure 49 - Key Length Selection
version 3.2
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User Manual for AZ110 Broadcast Satellite Modulator with ASI interface
Switching from one key size to another erases all keys in use.
SHAPING THE FUTURE SATELLITE OF COMMUNICATIONS