Brussels / 2 & 3 February 2013



The annual keysigning event at FOSDEM is one of the largest of its kind. With more than one hundred participants every year, it is an excellent opportunity to strengthen the web of trust. We use a slightly modified version of the Zimmermann-Sassaman key-signing protocol relying on a key submission server rather than email to to collect keys.

Before the event

Submit your keys

The submission deadline has passed.

If you intend to participate in the PGP keysigning event at FOSDEM 2013, you must submit the keys you would like to have signed to the keyserver listening on If you are using GnuPG, this can easily be accomplished with:

gpg --keyserver --send-key [keyid]

You may want to verify that your submission made it to the keyserver by checking the list of submitted keys at

During the submission period, graphs will be generated of the density of the web of trust and the rate at which keys are being submitted. You can find these graphs at:

The deadline for submissions is Thursday, 31 January 2013. After this date, the keyserver will no longer accept submissions and the official keylist will be published.

Download the list of participants

If you are participating in the keysigning event (i.e.: you have submitted your key to the keyserver), you should download the final list of participants and follow its instructions closely.

The final list of participants is available from

If there is a trust-path between you and the author, you should verify the list's detached signature using:

gpg --verify ksp-fosdem2013.txt.asc ksp-fosdem2013.txt

The keysigning event takes place on Sunday, at 14:00, in the corridor on the second level of the U building. Please bring the printed list, a pen and appropriate form of identification with you to FOSDEM. Be on time!

After the event

If you participated in the keysigning event, but missed (parts of) the participant list hashes as they flashed by during the starting presentation, you should verify the hashes before signing any keys.

The hashes can be downloaded from If there is a trust-path between you and the author, you should verify the file's detached signature using:

gpg --verify ksp-fosdem2013-hashes.txt.asc ksp-fosdem2013-hashes.txt

Please complete your signing homework before Sunday, 9 June 2013, and upload new signatures on your keys to a well-connected keyserver. New statistics of the density of the web of trust at FOSDEM will be published soon after that date.