# cisco/libsrtp

Library for SRTP (Secure Realtime Transport Protocol)

Repository: https://github.com/cisco/libsrtp
Canonical: https://ross.abutalabs.com/products/libsrtp
Language: C
License: NOASSERTION
License Family: other
Topics: srtp, libsrtp, rtp
Last push: 2026-08-13T07:45:27+00:00

## Health v2 (maintenance only)
Score: 78/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 42, longevity 100
- inputs: {"age_days": 4906, "days_push": 20, "days_rel": 172, "gap_med": 362, "n_releases_24m": 2}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1397, forks 520 (observed 2026-08-28T04:04:36.761303+00:00)

## What it is
libSRTP is Cisco's open-source C library implementing the Secure Real-time Transport Protocol (SRTP, RFC 3711) along with a supporting cryptographic kernel. It provides confidentiality and authentication for RTP media streams used in real-time audio and video communication.

## Use cases
- encrypt and authenticate RTP media streams for VoIP calls
- add SRTP support to a WebRTC implementation
- secure real-time audio/video transport in a custom media server
- implement RFC 3711 SRTP in C applications
- protect SIP telephony media traffic
- build a video conferencing system with encrypted media

## When to choose
- you need a mature, standards-compliant SRTP implementation in C
- you are building VoIP, WebRTC, or video conferencing software
- you need a lightweight library with broad platform support and multiple build systems

## When to avoid
- you need DTLS or full signaling-layer security rather than media encryption
- you work in a higher-level language and prefer a binding-free managed solution
- you require all optional SRTP features, since only mandatory features are supported

## Facets
- artifact type: library
- maturity: stable
- function: security, cryptography, networking
- domain: networking, security, developer-tools
- platform: cross-platform, c
- tags: srtp, rtp, voip, webrtc, audio-video, encryption, real-time

## Member repositories
- cisco/libsrtp (main) score 78

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:36.761303+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:39:16.142003+00:00, confidence not recorded.
  - readme: https://github.com/cisco/libsrtp (fetched 2026-08-28T04:04:36.761303+00:00, sha 5ccdfcd5be6f)
- Data as of 2026-08-30T08:39:29.467469+00:00.