Blankom IRD-6100, Руководство пользователя

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BLANKOM IRD-6100 HD IRD User Manual
BLANKOM_IRD-6100_User_Manual_RR-V1.1-03-2018.doc - 37 -
BISS Descrambling (Basic Interoperable Scrambling System)
The BISS descrambling function application needs to be matched with the BISS scrambler Method
and keys usually used in the uplink of the SAT-TV Service. The BISS window is showed as follows:
The BISS descrambling only works for the one selected single TV Service to be decoded.
This BLANKOM IRD-6100 HD IRD BISS descrambling supports two modes: “Mode 1” and “Mode E”.
The User can select one of these two modes in the drop down list:
Explanations regarding BISS scrambling/de-scrambling:
BISS modes: BISS Mode 0: unscrambled (clear), BISS Mode 1: Scrambled with a session word (SW),
BISS Mode E: scrambled with encrypted session word (ESW). The session word is the key that is
used in the receiver (IRD) to descramble the transmitted data. Remark that BISS-E uses the same
scrambling algorithm as BISS Mode 1 but that there is an additional encryption on the session word.
BISS Mode 1 uses a 12 digit hexadecimal key as session word. The session word has to be
announced to all parties that are allowed to descramble the received data. Example:
123456ABCDEF. The session word can easily be compromised, there is no protection when
communicating it to the receive site(s).
BISS Mode E : Scrambled with encrypted session word (ESW). This mode uses the ID (identifier) of
the receiver(s) and a session word to calculate an encrypted session word (16 digits hex). There are
two possible IDs -
Buried ID - Injected ID . By encrypting the session word there is an additional
protection on the session word. The ESW can be communicated using a non-secure channel since in
order to descramble the received signal both the ID and the ESW need to be known.
Buried ID : Each receiver (IRD) holds a unique ID (i.e. the embedded serial number) that can be used
to identify that specific receiver: This is called the buried ID. If you want to do a transmission that is