Hi,

Could you take me off the cc please? Thanks. 

Sent from my iPhone

> On 13 Jul 2022, at 4:18 pm, Neil Madden <neil.mad...@forgerock.com> wrote:
> 
> 
>> On 12 Jul 2022, at 20:26, Michael Richardson <mcr+i...@sandelman.ca> wrote:
>> 
>> 
>> EXEC-SUM: /.well-known/jwks.json seems in use, but not registered
>>         with IANA.   I don't know if it's appropriate for my use.
>>         Seems to contain RFC7517 content.
> 
> A limitation of the JWKSet format is that it provides no way to designate 
> which keys in the set are intended for what function. For example if I have 
> some keys I use for signing OIDC id tokens and another set of keys I use for 
> signing software updates, there is no way to distinguish them if they are all 
> in a single JWKSet (unless those functions use different algorithms). It is 
> therefore wise to have distinct JWKSets published on distinct URIs for 
> distinct functionality. A single well-known jwks.json is putting all your 
> keys in one basket and will inevitably (IMO) lead to problems, maybe even 
> security issues. 
> 
> (I have seen some software use the “kid” to indicate purpose, but if you 
> support key rotation then you’ll end up with duplicate “kid” values, which 
> causes issues in some client software).
> 
> — Neil

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