Next Protocol Negotiation
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Next Protocol Negotiation (NPN) is a Transport Layer Security (TLS) extension for application layer protocol negotiation. NPN allows the application layer to negotiate which protocol should be performed over a secure connection in a manner which avoids additional round trips and which is independent of the application layer protocols.
It is used by SPDY.
On April 11, 2012, Google's Adam Langley announced that TLS False Start will be disabled in Google Chrome from version 20 except for websites with the NPN extension.[1]
On March 20, 2013, Google's Adam Langley reported[2] that NPN will be replaced with a reworked version known as Application Layer Protocol Negotiation (ALPN).[3]
References
- ↑ Langley, Adam. "False Start's Failure (11 Apr 2012)". Retrieved 25 September 2013.
- ↑ Langley, Adam. "» NPN and ALPN". Retrieved 2 April 2013.
- ↑ ALPN
External links
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- NPN Google Technical Note (published 2011)
- NPN IETF Draft (published 2010)
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