The Secure Real Time Protocol

Document Type Expired Internet-Draft (individual)
Last updated 2000-11-21
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes the Secure Real Time Protocol (SRTP), a profile of the Real Time Protocol (RTP) which provides privacy, message authentication, and replay protection. SRTP achieves high throughput and low packet expansion by using an additive stream cipher for encryption, a universal hashing based function for message authentication, and an `implicit' index for sequencing based on the RTP sequence number.


David McGrew (
David Oran (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)