Policy filtering services are built into security processing of an execution environment for resolving how to handle a digital security certificate of a communicating entity without requiring a local copy of a root certificate that is associated with the entity through a certificate authority chain. A gap between the housing parts in an expanded state can be covered by a covering element. The dielectric layer is polished for bulk removal of the dielectric layer for a remaining portion of the polishing process. The cover and leaves only have a point contact with each other, and the leaves extend away from the cover at a relatively shallow angle.