XML Signatures for widgets

The WebApps working group has published a first working draft of the Widgets 1.0: Digital Signatures recommendation. This is normally neither my working nor my research area. But this recommendation makes already use of XML Signature 1.1 and is a really cool and obvious usage scenario for XML Signatures. Since the widgets are based on XML there is no better possibility to sign this data than using XML Signatures. Maybe this is the killer (end user) application for XML Signatures that has been missing so far…