This page lists usernames of various websites as well as signatures of various cryptographic keys.

If you have reason to believe someone is trying to impersonate me, please contact me right away.

Verify this page: View it in the Google cache or the Wayback machine. The source code is on GitHub. A detached GnuPG signature of this document is available here.

Accounts on websites

Any account on any website that is not listed here (or under deprecated), should be considered an impersonation - please contact me right away!

Facebook: No, I don't have Facebook. If you find an account that looks like it belongs to me it is most certainly an impersonation!
Some websites I barely use. Don't expect too much activity here, but feel free to add me to your Network:

SSH keys

SSH keys used to connect to remote machines. I use unique keys for every host.


My primary GPG key (download) is used for signing commits on GitHub:

This key is renewed every two years.

A second GnuPG key (download): is used on some remote hosts. Since its more likely that the host is compromised, less trust should be given to this (and it is hence only valid for at most a year).


A short, certainly incomplete list of stuff I don't use anymore:

About this homepage

The source for this homepage is managed on GitHub.