ietf-openpgp
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Re: [openpgp] SHA3 algorithm ids.

2015-08-11 09:06:21
On Tue, Aug 11, 2015 at 6:10 AM, Werner Koch <wk(_at_)gnupg(_dot_)org> wrote:

On Mon, 10 Aug 2015 22:50, phill(_at_)hallambaker(_dot_)com said:

Given that email recipients tend to end up having to implement all the
code
points in a cipher suite because they can't really control what is sent,
I

That is not the case with OpenPGP.  If you encrypt and sign the key
gives you a list of hash algorithms supported by the recipient.  Only
those may be used.   In a signature only case there is no point in an using
extravagant hash algorithm because most recipients won't be able to
verify such a signature.


And what then happens if you use the same key on two different devices
running two different applications?

Advertising crypto capabilities is good. But it isn't a panacea. If people
are going to use end to end encrypted email as default, they have to be
able to read their mail on multiple devices.
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