> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/configuration-details/configuration-by-web-portal-category/sip/tls-srtp.md).

# TLS/SRTP

TLS allows TelcoBridges' ProSBC to secure SIP signaling messages over networks, and SRTP secures the voice media traffic.

## Supported TLS RFCs

<table><thead><tr><th width="419" valign="top">Specification</th><th valign="top">Supported</th></tr></thead><tbody><tr><td valign="top">RFC 4492: Elliptic Curve Cryptography (ECC) Cipher Suites for Transport Layer Security (TLS)</td><td valign="top">Yes, starting from <a href="https://telcobridges.atlassian.net/wiki/x/FACuMw">ProSBC version 3.3.5</a></td></tr><tr><td valign="top">RFC 5246: The Transport Layer Security (TLS) Protocol Version 1.2</td><td valign="top">Yes</td></tr><tr><td valign="top">RFC 5288: AES Galois Counter Mode (GCM) Cipher Suites for TLS</td><td valign="top">Yes, starting from <a href="https://telcobridges.atlassian.net/wiki/x/FACuMw">ProSBC version 3.3.5</a></td></tr><tr><td valign="top">RFC 8446: The Transport Layer Security (TLS) Protocol Version 1.3</td><td valign="top">Yes, starting from <a href="https://telcobridges.atlassian.net/wiki/x/FACuMw">ProSBC version 3.3.5</a></td></tr></tbody></table>

## &#x20;Supported SRTP RFCs

<table><thead><tr><th width="420" valign="top">Specification</th><th valign="top">Supported</th></tr></thead><tbody><tr><td valign="top">RFC 3711: The Secure Real-time Transport Protocol (SRTP)</td><td valign="top">Yes</td></tr><tr><td valign="top">RFC 4568: Session Description Protocol (SDP) Security Descriptions for Media Streams (SDES)</td><td valign="top">Yes</td></tr></tbody></table>


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