!!! Overview[1]
[{$pagename}] ([RFC 8472]) specifies a [Transport Layer Security] ([TLS 1.2]) [RFC 5246] [extension|TLS extension] for the negotiation of [Token Binding Protocol] version and key parameters.

When using the [Token Binding Protocol] the [client] and [server] need to agree on the [Token Binding Protocol] version and the parameters (signature algorithm, length) of the Token Binding key.  [{$pagename}] specifies a new [TLS extension] to accomplish this negotiation without introducing additional network round-trips.

!! More Information
There might be more information for this subject on one of the following:
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* [#1] - [Token Binding Negotiation TLS Extension|https://tools.ietf.org/html/draft-ietf-tokbind-negotiation-07|target='_blank'] - based on information obtained 2017-03-24-