Protocols BroadNet answer

What is SRTP (Secure RTP)?

Last reviewed July 22, 20261 min readReviewed by BroadNet engineering

Quick answer

SRTP (Secure Real-time Transport Protocol, RFC 3711) is the encrypted profile of RTP: it encrypts and authenticates the voice and video media of a VoIP call so it can't be eavesdropped or tampered with in transit. It is typically paired with SIP over TLS (which protects the signaling) and with DTLS key exchange in WebRTC, giving end-to-end call confidentiality. See /answers/what-is-rtp, /answers/what-is-sip, and /answers/what-is-webrtc.

Plain-language definitionVendor-neutralReviewed July 22, 2026

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