Security in PMR systems

Private mobile radio (PMR) systems provide two way communications for use in private business applications. Their application may be described as “Teamwork over Distance”, enabling groups of users to remain in constant communications. PMR systems themselves may be privately owned for the exclusive use of the owner, or owned by a third party with use of the systems leased in a similar way to public telephony networks. These latter systems are referred to as public access mobile radio (PAMR) or shared systems. The paper covers the application of security to present day PMR and PAMR systems, with the provision of such services as confidentiality and authenticity; and discusses the security aspects of the new Trans European Trunked Radio (TETRA) system