I do digital security stuff for a living and take an active interest in Internet policy. Sometimes I do more of the same in my spare time, and sometimes I even make music.
To send me encrypted e-mail, use key 0xC2FAF4F5.
But to be honest, if you want to talk, you can just send an unencrypted email to martin@ this domain and we can find a more secure channel to use.
I used to go by Martin Löwdin, but recently I added a second last name. Fällman is pronounced sort of like Feldman or Fellman. (As for Löwdin, don't bother.)