In many cases, information security is a vital component of a general land mobile
radio system. Several security services are available for implementation in these
systems. The services are generally optional and they operate within the bounds
of the interfaces defined for non-secure operation. This security overlay may be
used to provide security of information transferred across general FDMA or
TDMA land mobile radio systems. The purpose of this document is to define the
meaning of these security services. The definition and detail of how security
services are provided is outside the scope of this document.
This document was generated in response to Project 25 requirements for
security services; however, it is applicable to any general land mobile
communications system. TIA 102 security standard documents define protection
of Phase 1 and Phase 2 systems. TIA 905 security standard documents define
protection of Phase 2 TDMA systems. The security services defined in the TIA
102 and TIA 905 security documents are to be interoperable across the Phase 1
and Phase 2 FDMA and the Phase 2 two-slot TDMA air interfaces.