Newtec M6100 - Distribution of Encrypted Session Words over a Non-Secure Channel

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Features Descriptions M6100 Broadcast Satellite Modulator
often creates a descrambling interruption on the receiver side. Changing the active session word on
the scrambler side shall thus only be done if non-valuable content is being transmitted at that time.
Otherwise, it is best to edit the inactive session word and then switch to it. The descrambler should
automatically follow the changes, as described in the aforementioned procedure.
Changing the key parity on a scrambler will not interrupt the stream. It is thus a
seamless operation, if the descrambler is properly configured on the receive side..
12.11.2.4 Distribution of Encrypted Session Words over a Non-Secure Channel
When the distribution of a session word cannot be performed over a secure channel it is advised to
add extra protection to the clear session word.
Adding extra protection is done to avoid that non authorized parties have access to the clear session
word and at the same time to the scrambled content.
The encryption key of the Session Word is called a device identifier. Two identifiers are defined in
BISS:
• A group identifier (the Injected ID), common for several units. This identifier is secret and cannot
be read by an operator. It is used when an organization has several devices part of the same
network. The Injected ID is entered in all devices of the same network. The same Encrypted
Session Word can then be used on all devices to protect a transmission. This Encrypted Session
Word cannot be used on any other device that does not have this Injected ID.
• A buried identifier (the Buried ID), unique for each unit. This identifier can be read on the front
panel. It is not fully secret. Its use is to protect a Session Word that has to be sent to that unit
specifically. The operator will read the buried ID and communicate it to the Session Word owner,
so that this person can send back the Encrypted Session Word. This Encrypted Session Word
can only be used by that device.