On Tue, Jan 12, 2010 at 2:47 PM, Tyler Close <[email protected]> wrote: > On Tue, Jan 12, 2010 at 2:44 PM, Adam Barth <[email protected]> wrote: >> Let my phrase my question another way. Suppose the following situation: >> >> 1) I'm a server operator and I want to provide a resource to other web sites. >> 2) I've been reading public-webapps and I'm concerned about the >> ambient authority in CORS. >> >> How can I share my resource with other web sites and enjoy the >> security benefits of UMP? > > Follow the advice given in the "Security Considerations" section of > the UMP spec: > > http://dev.w3.org/2006/waf/UMP/#security
As a server operator, why can't I follow that advice with CORS? Nothing there seems specific to UMP. I don't understand how UMP is helping server operators deal with the risks of ambient authority. When a server operator makes a resource available via UMP, they're also making it available to CORS with it's attendant security model. Adam
