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What is DTLS – Datagram Transport Layer Security?

Datagram Transport Layer Security (DTLS) is a communications protocol designed to protect data privacy and preventing eavesdropping and tampering. It is based off the Transport Layer Security (TLS) protocol, which is a protocol that provides security to computer-based communications networks. The main difference between DTSL and TLS is that DTLS uses UDP and TLS uses TCP. It is used across web browsing, mail, instant messaging and VoIP. DTSL is one of the security protocols used for the WebRTC technology along with SRTP.

Further reading:

DTLS is defined in RFC 6347

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