A method for Real-time Transport Protocol (RTP) packet authentication on a packet data network. In particular, the invention relates to a method for preventing toll fraud, privacy compromise, voice quality degradation, or denial of service (DoS) on Voice over IP networks. The Real-time Transport Protocol...http://www.google.com/patents/US20050265349?utm_source=gb-gplus-sharePatent US20050265349 - Method for real-time transport protocol (RTP) packet authentication
