The libSRTP library is an
open-source implementation of the Secure Real-time
Transport Protocol (SRTP) originally authored by Cisco
Systems, Inc. It is available under a BSD-style license.
Check here for recent news about libSRTP.
SRTP is a security profile for RTP
that adds confidentiality, message authentication, and replay protection
to that protocol. It is specified in RFC 3711. More information on the SRTP protocol itself can
be found on the Secure RTP Page. Frequently Asked Questions are answered in the SRTP FAQ.
The libSRTP distribution is a .tgz
file containing C source code. To get started do the following (using the latest version of the distribution available for download):
tar xvf srtp-X.Y.Z.tar
For information on how to build the library and run the test driver and example
programs, see the libSRTP Overview and Reference Manual, which is included in the distribution as doc/libsrtp.pdf. The manual documents the Application Programming Interface (API) for the library. Please note that the README file in the distribution is somewhat out of date.
Libsrtp is graciously hosted
The initial implementation of libsrtp
was done by David
McGrew of the Cisco Systems, Inc. Advanced Crypto Development