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Feature Descriptions
16.18.1 Content Protection
Content is protected by encrypting the baseband frames of a DVB-S2(X) transmission.
Encryption is applied on the data field of the baseband frame, using the AES algorithm to encrypt it.
Different baseband frames are encrypted independently.
The encryption-decryption process makes sure that at the output of the decryptor, the baseband
frame is identical to the one at the input of the encryptor.
The signaling used for the encryption is proprietary. Unencrypted streams can be received by any
DVB-S2(X)-compliant receiver. Encrypted signals can only be received by devices that have the
Newtec AES decryption mechanism implemented.
16.18.2 Key Management
16.18.2.1 Overview
The key management defines the ways encryption/decryption keys are sent to and used by the
encryptor and decryptor engines.
The key management system is straightforward, enabling effective manual or automated operations.
Keys are sent to the devices through the monitoring and control channel.
The encryption keys must be entered on the modulator by a human operator or an automated
management system. The content key can be entered in non-encrypted or in encrypted format.
•
The non-encrypted format is used in any deployment where the communication channel (human
operator or computer network) used to send the content key to the device is secure enough.
•
The encrypted format is used when the communication channel used to distribute the keys to the
device is not secure. In that case, the system uses a secret group key stored in the device to
guarantee that the encrypted content key can only be used on that device (or devices with the
same group key).
Each device can support two keys for each stream: the odd key or the even key. One key is the
active key, while the other one is the next key to use. This allows to distribute keys to all devices,
then to switch to the new key on all devices at the same time.
Newtec Proprietary
Confidentiality: Unrestricted
MDM9000 Satellite Modem
R3.2_v1.0
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