SRTP (Secure Real-Time Transport Protocol or Secure RTP) is an extension to RTP (Real-Time Transport Protocol) that incorporates enhanced security features. Like RTP, it is intended particularly for VoIP (Voice over IP) communications.
SRTP was conceived and developed by communications experts from Cisco and Ericsson and was formally published in March 2004 by the Internet Engineering Task Force ( IETF ) as Request for Comments (RFC) 3711. SRTP uses encryption and authentication to minimize the risk of denial of service( DoS ) attacks. SRTP can achieve high throughput in diverse communications environments that include both hard-wired and wireless devices. Provisions are included that allow for future improvements and extensions.