Hi Phil,

> Am 16.01.2019 um 00:38 schrieb Phil Hunt <phil.h...@oracle.com>:
> 
> I have had a couple reviewers comment whether this means client 
> authentication is optional in Sec 3.12 for token refresh:
> 
>>    *  authentication of this client_id during token refresh, if
>>       possible, and

This just cites RFC 6749, where authentication for refresh is not required if 
not possible, I.e.  refresh for public clients is unauthenticated.

> Do we not mean authentication of the client or some equivalent (e.g. looking 
> at browser cookies).

The BCP goes beyond RFC 6749 by expecting the AS bind refresh tokens to a 
certain instance of a public client. Pls. see 

„Authorization server MUST utilize one of the methods listed below to detect 
refresh token replay for public clients:“

....

kind regards,
Torsten.

> 
> Phil
> 
> Oracle Corporation, Cloud Security and Identity Architect
> @independentid
> www.independentid.com
> phil.h...@oracle.com
> 

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