Secure Real-Time Protocol

Why Trust Techopedia

What Does Secure Real-Time Protocol Mean?

Secure Real-Time Protocol (Secure RTP or SRTP) is an extension of the RTP protocol with an enhanced security mechanism. It provides encryption, authentication and integrity verification of data and messages passed through the RTP-based communication protocol. Released in 2004, SRTP was developed by Cisco and Ericsson security experts.

Advertisements

Techopedia Explains Secure Real-Time Protocol

SRTP provides RTP protocol functionality while strengthening the security of unicast and multicast messaging, including multimedia messages and communication, like internet telephony and video conferencing. SRTP enforces an Advanced Encryption Standard (AES) algorithm to encrypt and decrypt all incoming and outgoing messages. The authentication mechanism provides a hash-based message authentication code (HMAC) algorithm, which implements a cryptographic hash function and secret key to validate a message's authenticity and integrity.

Secure RTP also protects against replay attacks by maintaining a message index, which is used to verify new messages.

Advertisements

Related Terms

Margaret Rouse
Technology Expert
Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.