Web GUI Monitoring & Control
4.8.5
BISS-E
The transport stream is decrypted by a calculated session word. This session word is generated
from an injected ID and an Encrypted session word. This is fundamentally more secure as both
the Injected ID and Encrypted session words are required for decryption and each receiver
could have a unique Encrypted session word. The Injected ID is a 14 digit Hex value and the
Encrypted Session Word (ESW) is a 16 digit hex value. If the key or the ID is not present then the
last entered values will be used.
4.8.6
Odd/Even-1
This mode is not part of the BISS standard but has been successfully interoperated with other
manufacturers who have similar variants. Each MPEG packet has a field in the header which
indicates if it is in the clear, encrypted using an ODD key or encrypted using an even key. While
BISS only uses the one key, this mode allows two independent keys. The advantage of this mode
is that it allows keys to be programmed offline while using the other key for decryption. Both the
odd and the even session word will require a 12 digit hex value. The even key is the same key as
that used for BISS-1.
4.8.7
Odd/Even-E
Odd/Even-E also uses the odd and even keys in the same way as Odd/Even-1 mode but each
key is encrypted using the same Injected Id. The Injected Id will require a 14 digit hex value and
the ESWs will both require 16 digit hex values. The even key is the same key as used for BISS-E.
Figure 4.21: Odd/Even-E Selected
SBD75e Series Demodulator Installation and Operation Manual
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