Identification isn't authentication. A public client can identify itself for 
the purpose of providing user context, statistics, etc.

EH

From: [email protected] [mailto:[email protected]] On Behalf Of 
Andrew Arnott
Sent: Sunday, February 12, 2012 8:22 PM
To: OAuth WG ([email protected])
Subject: [OAUTH-WG] Reconciling section 2.2 with 3.2.1

Can anyone please help me understand how these two sentences do not contradict?

>From section 2.2 Client Identifier
The client identifier is not a secret, it is exposed to the resource owner, and 
MUST NOT be used alone for client authentication.

>From section 3.2.1 Client Authentication
A public client that was not issued a client password MAY use the client_id 
request parameter to identify itself when sending requests to the token 
endpoint.

Thanks.

--
Andrew Arnott
"I [may] not agree with what you have to say, but I'll defend to the death your 
right to say it." - S. G. Tallentyre
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