On Mon, Oct 7, 2013 at 6:05 PM, Mountie Lee <moun...@paygate.net> wrote:
> SHA2 hash required in e-commerce transaction by the korean regulation.
> and which is also used in TLSv1.1+.

Hi,

First, we will be enabling TLS 1.2 in Firefox very soon.

But, I think you may be referring to SHA-2-based cipher suites
proposed in this internet draft:
http://tools.ietf.org/html/draft-bjhan-tls-seed-00

Unfortunately, that internet draft expired and also the draft didn't
even specify the cipher suite code points.

Where can I find the current version of the Korean regulations on
encryption. I have read this article:
http://www.koreatimes.co.kr/www/news/biz/2012/04/123_109059.html

That article notes that SEED is actually not mandatory in Korea any
more. If so, it seems like a good idea to help the Korean community
standardize on more common algorithms, right?

That article also notes that implementations other than the ActiveX
control have to be certified by the Korean government in order to be
used. So, it seems like our SEED implementation could not be used
legally anyway, since it hasn't been certified. Is that your
understanding?

My understanding is that the Korean government would also require
websites that fall under these regulations to use certificates issued
by some Korean certificate authorities. But, Mozilla does include
either of the Korean certificate authorities and it seems unlikely to
happen soon. See https://bugzilla.mozilla.org/show_bug.cgi?id=335197

Finally, the SEED cipher suite we do currently support does not
support ephemeral key exchange. I see that the internet draft I linked
to above does attempt to specify SEED cipher suites that support
ephemeral key exchange.

So, it seems pretty clear to me that it is OK to disable the SEED
cipher suite we have currently enabled for now, while we figure out
all the things that are necessary to help our Korean users.

Cheers,
Brian
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