On Feb 17, 2015, at 3:53 PM, Peter Saint-Andre - &yet <pe...@andyet.net> wrote:

>>> The text above also slightly skirts the case where an existing
>>> protocol is being updated for some other reason besides modernizing
>>> its TLS/DTLS usage. So if the Foo protocol required support for weaker
>>> ciphers than what the BCP requires/recommends, and someone writes
>>> Foobis for the purpose of making non-TLS-related updates, do we expect
>>> Foobis to conform to the BCP? Or continue to require support for
>>> weaker ciphers for interoperability purposes? Or both? Or leave it up
>>> to the consensus at the time of Foobis publication? Would be good to
>>> clarify that case further I think.
>>> 
>> 
>> In fact I think the text addresses exactly this case, by making the
>> update conditional on "the community... wishing to modernize [the
>> protocol's] usage of TLS". In other words, what works for one community
>> may not work for another, e.g. for reasons of interoperability.
> 
> I agree with Yaron here. One example that came up during WG discussion of 
> this document was certain IoT protocols, since the relevant devices might not 
> have support for all of the necessary algorithms. Instead of building in an 
> explicit carve-out for those protocols, we felt it was better for those 
> communities to decide how they wanted to proceed.

Ok, fair enough. I would personally find it a little better to make that more 
explicit in the document, but will not quibble over it.

Thanks,
Alissa

> 
> Peter
> 
> -- 
> Peter Saint-Andre
> https://andyet.com/
> 

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