Please don't use a voice call even if you have my number or Signal invite. I'm fighting a slight phone phobia. Note that this is regarldess of the technology used. Might be OK if pre-arranged.
E-mail: mc [at] hack.org
PGP key, but please don't. If you really want to send me something sensitive, consider the alternatives.
XMPP: mc [at] lysator.liu.se. Note: Only text!
OMEMO fp: d75fd0c7-c5d8c319-d6c1433e-cee7e2e8-7e38acf2-34c16023-58c06406-86836c32
IRC: mc @ hackint.
Matrix: Only at work. Please don't.
Please note: I'm often taking breaks from "social" "media". Please don't be offended if I don't answer your friend request.
Note that what I post is usually followers-only so it will appear empty if you're not following me. Posts are set to autodelete after a time.
I'm rather active on my blog and sometimes on my gemlog:
gemini://gem.hack.org/who/mc/log/
(Strict TLS 1.3, self-signed ed25519. If your Gemini client complains it's probably because of old TLS libraries.)
Last updated: <2026-01-12 00:01:04 CET>