Content-Based Detection and Prevention of Spam over IP Telephony - System Design, Prototype and First Results

Spam over IP-telephony (SPIT) may emerge as a major threat requiring effective protection mechanisms. A number of anti-SPIT frameworks have been proposed in the last years. These are mainly based on call pattern and signaling analysis as well as caller reputation techniques resulting in black, grey or white lists of callers. Charging schemes and an… (More)