Re: [certid] open issue: self-signed certs

Bil Corry <bil@corry.biz> Sat, 10 April 2010 16:23 UTC

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Date: Sat, 10 Apr 2010 09:23:33 -0700
From: Bil Corry <bil@corry.biz>
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To: Peter Saint-Andre <stpeter@stpeter.im>
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Cc: certid@ietf.org
Subject: Re: [certid] open issue: self-signed certs
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Peter Saint-Andre wrote on 4/9/2010 9:29 AM: 
> Regarding self-signed certs, Alexey and I had the following exchange...
> 
> On 4/5/10 3:34 PM, Alexey Melnikov wrote:
>> Peter Saint-Andre wrote:
>>
>>> Given that a self-signed certificate can say *anything*, I don't know
>>> that it's helpful to enforce any rules about issuance and checking of
>>> self-signed certs. It's not as if any "certification" has taken place in
>>> this situation.
>>>
>> +1.
> 
> Someone named "ArkanaoiD" (how's that for identity? :) wrote:
> 
>    Well, when it comes to implementation we get *two* matching
>    algorithms then, which is definitely no good.
> 
> IMHO we don't necessarily get two matching algorithms -- it's just that
> the matching algorithm for self-signed certificates is not specified in
> this document. Given that we are trying to define best practices for
> secure authentication of application services, I don't think it makes a
> lot of sense to discuss self-signed certs.
> 
> Bruno Harbulot wrote:
> 
>    I'm not sure this I-D should treat self-signed certs completely
>    differently from CA-issued certs. Self-signed certs could be
>    considered as a special case of CA-issued certs.
> 
> And Bil Corry wrote:
> 
>    I agree.  Isn't the distinction between CA-issued certs and
>    self-signed certs more-or-less which CAs you choose to trust?
> 
> Bruno and Bil, would you find it acceptable if this document simply does
> not mention self-signed certificates? We really are trying to limit the
> scope of this document to a very particular problem, but I'm quite open
> to discussing related problems in other documents. However, if it is
> going to be more confusing to say that self-signed certs are out of
> scope then I'd consider including some text about them.


How about the scenario where a company acts as its own CA for internal systems; i.e. their root cert is installed across their entire enterprise and is effectively a CA for those browsers.  Is that in or out of scope for this document? 


- Bil