Hello, 

This is Cybertrust Japan. One of our root CAs uses SHA-1 for CRL signing. 
But we would like to sunset the use of SHA1.  In fact, our plan is to 
retire this SHA-1 Root of SecureSign Root11 and replace it with its 
successors. So we are preparing root inclusion requests. 


Best,
Mo

2022年2月3日木曜日 2:35:58 UTC+9 [email protected]:

> For the sake of completeness: Let's Encrypt / ISRG does not sign SHA-1 
> hashes for any purpose, and would be amenable to any sunset date.
>
> We do accept signatures over SHA-1 hashes of CSRs provided by subscribers, 
> and of course accept SHA-1 hashes for the issuerKeyHash and issuerNameHash 
> in OCSP requests, but those are not relevant to this proposal.
>
> Aaron
>
> On Tuesday, February 1, 2022 at 7:59:37 PM UTC-8 [email protected] wrote:
>
>> I have emailed CAs in the Mozilla program asking them to respond here.
>>
>> On Wed, Jan 26, 2022 at 12:41 PM Ryan Sleevi <[email protected]> wrote:
>>
>>>
>>>
>>> On Wed, Jan 26, 2022 at 2:00 PM Ben Wilson <[email protected]> wrote:
>>>
>>>> See responses inline below.
>>>>
>>>> On Tue, Jan 25, 2022 at 11:12 PM Ryan Sleevi <[email protected]> wrote:
>>>>
>>>>> It’s not clear: what situations make it appropriate for a CA 
>>>>> communication, versus discussion here?
>>>>>
>>>>
>>>> Yes.  It is preferable that discussion take place here. However, a 
>>>> survey would still be public, as they have been in the past, and the CCADB 
>>>> would collect all of the responses in a table format.
>>>>
>>>
>>> Oh, for sure :) I just know that the surveys have historically had 
>>> delays or had confusion by CAs in interpreting questions, and the survey 
>>> approach somewhat predates the m.d.s.p. participation requirement. I 
>>> totally realize that it has benefits for bringing direct awareness, but I 
>>> raise it to try and understand if the expectation is to always have the two 
>>> parallel paths for soliciting feedback, or if it might just be sufficient 
>>> to email blast CAs to say "Hey, here's the discussion, to send feedback, 
>>> please participate here". That, I think, might achieve the goal of 
>>> highlighting the importance, while still centralizing some of the 
>>> conversation :) Just a thought
>>>
>>>

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