Person-to-person realtime IP communications, like presence, VoIP and video applications, offer clear benefits for the enterprise as time- and money-savers. Unified functionality is now available, where all of the above are integrated into one streamlined application and interconnect with other networks. This creates a very important business tool and usage is increasing.

Session Initiation Protocol (SIP) has emerged as the protocol that will fuel this development. Its simplicity and the fact that it is based on Internet standards give SIP clear advantages over older protocols. Analysts predict that SIP will dominate and the evidence given by actual deployments among service providers and equipment vendors further support that prediction.

This white paper describes the security issues associated with SIP, and how to address them within enterprise domains.