PCS privacy and authentication implementation challenge

As PCS evolves in the US, issues relative to the privacy of the user's voice and data and the authentication or validation of the user to the service provider are being addressed. The two principle alternatives being reviewed for US privacy and authentication are the methodologies defined as part of the global system for mobile (GSM) communications and the EIA/TIA interim standard IS-54-B for cellular system dual-mode mobile station-base station compatibility. The paper looks at the key aspects and issues of each alternative and the resulting interworking challenge.<>