MAC and HOTK describe different properties of a token, and could both be used 
in the same token.  MAC specifies a basic format for a signed token payload and 
transaction.  HOTK defines part of a token payload.  HOTK payload can be 
carried in a MAC token.

-bill


________________________________
 From: Sergey Beryozkin <[email protected]>
To: "<[email protected]>" <[email protected]> 
Sent: Thursday, December 20, 2012 1:49 PM
Subject: [OAUTH-WG] Few questions about HOTK
 
Hi Hannes, others,

I'd like to understand what is the difference between HOTK Symmetric [1] and 
MAC [2].

I'm reading about HOTK Symmetric and JWS profile and it seems like HOTK 
Symmetric text can support MAC.

My main question at the moment: does HOTK (Symmetric) offer an alternative to 
MAC or is HOTK actually a higher-level token scheme which can support different 
types of tokens ?

thanks, Sergey

[1] http://tools.ietf.org/html/draft-tschofenig-oauth-hotk-01
[2] http://tools.ietf.org/html/draft-ietf-oauth-v2-http-mac-02
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