Developing a Legally Compliant Reachability Management System as a Countermeasure against SPIT 1

This paper explains why SPIT (Spam over Internet Telephony) is harder to filter than conventional e-mail spam, lists scenarios, possible countermeasures, and presents a prototype for a legally compliant and privacy-friendly SPITfiltering reachability management system that is currently in development within the SPIT-AL project.