Hi, I've posted v0.1 of the promised (threatened? :) )security architecture on the GWS-WG page. It's incomplete at present, and I hope to do a more-complete v0.2 tomorrow. Cheers, Guy Guy Rixon gtr at ast.cam.ac.uk Institute of Astronomy Tel: +44-1223-337542 Madingley Road, Cambridge, UK, CB3 0HA Fax: +44-1223-337523