Arthur de Jong

Open Source / Free Software developer

Contact information

You can email me at
For communication regarding software projects please use a project's mailing list if one is available.


You can use PGP when sending mail:

key: 4096R/10E0AFC1
fingerprint: 452E C2CB 65CF 68C2 A1AD BF5F 2A8B 7468 10E0 AFC1
My PGP key is on all major keyservers and also available in arthur.asc.


I'm available for keysinging in the area of Delft in the Netherlands. If you want to have your key signed with my key (4096R/10E0AFC1) you have to:

  • give me a printout of your public key's fingerprint (e.g. output of gpg --fingerprint <your keyid>)
  • show me a valid government issued ID with a picture and name that matches the name on your key

Key transition

I've phased out my old 1024D/9F8D08A7 key and have replaced it with my 4096R/10E0AFC1 key. If you singed my old key, have a look at my key transition document.

Small print

By sending an email message to any address that will cause it to end up in my mailbox you hereby agree that:

  • I am, by definition, "the intended recipient" of the message;
  • you grant me a royalty-free, perpetual, irrevocable, non-exclusive and fully sublicensable right to use, reproduce, modify, adapt, publish, ridicule, create derivative works from and distribute the content.

This overrides any disclaimer or statement of confidentiality that may be included in your message.

Since it is trivial to intercept, read, modify and forge email messages and by design email messages are relayed and distributed by multiple parties, any statements embedded in email messages regarding confidentiality or legal validity of statements in non-encrypted email are considered silly.