Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), are cryptographic protocols that provide communication security over the Internet. TLS and SSL encrypt the segments of network connections at the Application Layer for the Transport Layer, using asymmetric cryptography for key exchange, symmetric encryption for confidentiality, and message authentication codes for message integrity.
Several versions of the protocols are in widespread use in applications such as web browsing, electronic mail, Internet faxing, instant messaging and voice-over-IP (VoIP).
TLS is an IETF standards track protocol, last updated in RFC 5246, and is based on the earlier SSL specifications developed by Netscape Communications.
| Internet protocols |
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| Application layer |
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| Transport layer |
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| Routing protocols * |
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| Internet layer |
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| Link layer |
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| * Not a layer. A routing protocol belongs either to application or network layer. |
Read more about Transport Layer Security: Description, Applications, Security, Support For Name-based Virtual Servers
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