[invertd]

Check out CCNx (Content Centric Networking) project from PARC/Xerox leaded by Van Jacobson - the security seems to be baked in the design. Here is an intro: http://www.slideshare.net/PARCInc/contentbased-security

[mckoss]

Why implement something complex, when something simple will do? This cache should be (in my mind), DRM-agnostic. Just put your DRM around your hash lists, just as you would around your original content. DRM can be a layer above the caching layer.