A capacitor includes a pair of electrodes and a metalized dielectric layer disposed between the pair of electrodes, in which the metalized dielectric layer has a plurality of metal aggregates distributed within a dielectric material. A number of embodiments are described for enabling authenticated communication between the nodes in an environment wherein there is a high bandwidth Dolev-Yao network amongst the nodes and non-spoofable, low-bandwidth empirical channels between each pair of nodes. The support member also provides a device to secure the apparatus to the disable tire and rim. The electrically connecting module includes a shell, an adjustable position-limiting element, a circuit board and a connector. These problems are particularly acute for nomadic communications systems such as voice over internet protocol communications networks.