Cryptographic security techniques for digital mobile telephones

Deals with various generic aspects concerning the application of cryptographic techniques to digital cordless and cellular telephone systems. The work presented is based on a review of literature regarding the relevant standards and recommendations for current and future systems. Particular reference is made to the ETSI GSM system. The aspects discussed include the choice of cryptographic algorithm, including public key cryptography, and the choice of protocols for such functions as cryptographic key management and user authentication. Various conclusions are drawn regarding the choice of the above, these being summarised by four key recommendations for current and future system design. The paper is concluded with a proposal for future research into the development of new security techniques for current and future systems