photo-ID
Philip Jackson
philip.jackson at nordnet.fr
Wed Dec 31 23:21:12 CET 2014
On 31/12/14 15:31, Robert J. Hansen wrote:
>
>> I've been looking for documentation with info on adding a photo id to a gpg key.
>> The instructions for adding are available but I can't find any advice for the
>> size, format, dpi etc of the image to be used.
>
> The major problem is there is very little good advice about this, and what there is keeps changing. For a long time the PGP Desktop product used 120x144 as a picture size. Back when a high-resolution display was 800x600 it made a lot of sense; now, when my laptop has a 2880x1800 display, a 120x144 image is literally smaller than a postage stamp.
>
> GnuPG adopted the photo-ID feature a few years later and technology had already progressed to the point where the GnuPG advice was 240x288. That advice hasn’t changed in over ten years; it’s probably out of date by now.
>
> With respect to what format should be used, the de-facto standard seems to be JPEG.
>
> I personally don’t find photo ID to be a useful feature. They’re too static. The photo ID on my certificate, for instance, is almost ten years old. If you need photo ID, a better route would appear to be something like keybase.io, which offers some neat tools for binding a certificate to photographs, social media accounts, and whatnot.
>
I take your point, Robert, regarding size. I've just tried a 240x288 image at
72 dpi and it is really small on my screen but it only weighs 29kB.
I'll have a look at your suggestion, keybase.io.
Philip
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