1 PSN Services Service Descriptions - Government Procurement ...

For additional security the Cassidian solution provides Secure Real Time Protocol (SRTP) within the
phone system and voice encryption products if required by the security domain. Additional details for
these are provided with the voice security section.
Security is inherent throughout the service using devices which contain security certificates suitable
for use within a TLS. Cassidian shall as part of its service delivery, validate the system to CESG Assured
Services (Telecom).
Within each PSN security domain the service is provided using standard telephony equipment using
the TLS to provide separation.
Telephony Service Core Features
For off network secure communication the system supports:
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SRTP to increase security for use within a RESTRICTED security domain
SCIP phones for use in the CONFIDENTIAL domain.
However where a site has a significant number of Authority Users within the CONFIDENTIAL domain,
Cassidian can deploy their Ectocryp Black product, which encrypts all secure telephony streams as they
leave the protected environment rather than deploying SCIP phones for each Authority User. This
provides cost savings by utilising standard telephones and reduced key management.