openpgp key signing policy


This policy is valid for all signatures made by the key on the contact page.


I live in Lisbon (Portugal) and I’m available to sign keys at any time (really!). If you live in Lisbon or if you’re passing by, I encourage you to contact me so we can arrange a meeting.

Prerequisites for signing

The signee (the key owner who wishes to obtain a signature to his/her key from me) must have an easy way of sharing his/her public key. I do not require the key to be available on a Key Server, even though it’s encouraged. I don’t mind fetching the key from a private location, such as a homepage.

The signee must be able to prove his/her identify by a way of a valid identity card and valid driving license. Both these documents must contain a picture of the signee.

The signee must have his/her OpenPGP key fingerprint printed on a piece of paper or card. I personally use Moo Cards. The fingerprint is the output of the following command (or equivalent if not a user of GnuPG):

gpg --fingerprint 0x12345678

The signee must be patient and understand that the whole process of signing a key takes some time.

The act of signing

After having received (or exchanged) the proof detailed in the above, I will sign the sheet of paper myself to avoid a fraud.

When at home, I will sign the key and upload it to an SKS Key Server, unless I didn’t fetch the key from a Key Server or if asked not to. If that’s the case, I’ll send separate signatures of each UID, on a encrypted e-mail message, to the corresponding e-mail addresses (unless they’re Level 2 signature).

The levels of signatures are described below.

Level of signatures

The levels of signatures, as described on RFC 4880, Section 5.2.1 - Signature Types, used by my signatures: