Mathew Sims

Contact Me


The best way to get in touch with me is to use Signal, the secure messaging app for Android and iOS.

Using Signal, you can message me on this number:


You’re welcome to email me at

For privacy, I recommend you use PGP email encryption (see below if you don’t know what I mean).

PGP Key:


PGP is a way of sending emails, making sure that the contents can’t be read by anyone other than the intended recipient. It’s like sending a letter in an envelope, where normal email is like a postcard - anyone who sees it on the way can read it. The Electronic Frontier Foundation (EFF) provide a handy guide to PGP/GPG and lots of other security things you really ought to know at