"Key signing refers to digitally signing someone else's public key using your own" (http://en.wikipedia.org/wiki/Keysigning). This year at LCA we will be holding a key signing event to try to strengthen the web of trust. We will be using the 'Sassaman-Projected' method and to participate in this you will need to submit your key by following the instructions at http://keysigning.org/event/lca2009. All keys that were entered during the registration process, should already be included, but please check as we'd hate for you to miss out. If you don't manage to do that before the conference, don't feel excluded. Come along to the key signing with some printouts of your fingerprint and you should still be able to participate through Ad-Hoc signing. You can also sign all the keys that have been submitted to the lca2009 keyring since there is no requirement that you be listed on it. Just follow the instructions at http://keysigning.org/event/lca2009 to prepare for the event and we hope to see you there.