Stef Walter -- stefw@collabora.co.uk Affiliation: Collabora Ltd, GNOME Maintainer of GNOME Keyring, and has been involved in a large number of security projects both in the open source community and otherwise. Demystifying crypto and security for users and allowing simple but powerful uses of security technologies is of special interest. Talk Duration: 30 minutes Talk: How to Store Trust: Assertions In order to provide a usable foundation for crypto on the desktop, the various crypto libraries need a way of accessing common information about the user's preferences with regard to certificates and 'trust'. "Trust Assertions" provide a way to represent certificate authority anchors, 'pinned' certificate exceptions, revocation lists, and other bits of trust information. A common method of accessing this information is missing from the open source desktop. We will show how we can make this information available through PKCS#11, so the user's applications (regardless of crypto library) can act consistently when making trust decisions. We'll present one solution, but more importantly: kick start progress in this area and discuss how we can move forward together.