Apologies if this is a big vague, i'm asking of the back of a conversation with our dev team.

We'd like to expose the rackspace cdn to an upload widget on one of our sites, currently uploads from this is pushed to our hosting provider. Our dev's have looked for a way to do this securely and without exposing our API key but have so far come up blank. I've looked at the s3 policys and it seems to tick most of the boxes but i cant fine the equivalent for rackspace.

Am i missing somthing obvoice? this seems like a fairly standard use of the service.