This invention concerns a multilayer film useful as release sheet for sheet molding compounds, comprising a first skin layer, a second skin layer, a barrier layer for monomeric resins wherein the barrier layer is between the first and second skin layers and the first and second skin layers comprise a mixture of polyolefin and adhesive resin. The guard system also includes a bracket configured contact at least two surfaces of the furniture element. The first IR sensor is disposed proximate to the first corner and has an unobstructed path and line of sight to outside of the electronic device via the first plurality of openings. In the second state, which is entered when a new cryptographic key is provisioned, the old key is still used for generating signatures for outgoing packets, however one or, if necessary, both of the old key and the newly provisioned key is used for authenticating signatures of incoming packets. In addition, the data mapped to that frame are written to a number of data blocks of that frame and the error-correction bytes generated for that frame are written to a number of error-correction blocks of that frame.