3. The method of claim 1, wherein said user specified interaction policies include specification of acceptable resource types for use to grant requested interactions of particular privacy levels.
3. The method of claim 1, wherein said user specified interaction policies include specification of acceptable resource types for use to grant requested interactions of particular privacy levels. 4. The method of claim 3, wherein said interaction request is granted when said contextual attributes include coincidence with other users consistent with said particular privacy levels.