Jigsaw puzzle icon, with a keyhole. It is designed for the Wikimedia project's portals that don't have a standard graphic or image to place in portal boxes.
User:Eubulides. Created with Inkscape 0.47pre4 r22446 (Oct 14 2009).

This image was created from scratch and is not a derivative of any other work in the copyright sense, as it shares only nonprotectible ideas with other works. Its idea came from File:Portal icon.svg by User:Michiel1972, which in turn was inspired by File:Portal.svg by User:Pepetps and User:Ed g2s, which in turn was inspired by File:Portal.gif by User:Ausir, User:Kyle the hacker and User:HereToHelp, which was reportedly from he:File:Portal.gif (since superseded or replaced?) by User:Naama m. It is not known where User:Naama m. got the idea from.
User:Eubulides