Abstract: A file recovery method executed by a storage device among a plurality of storage devices is provided. The file recovery method includes: detecting that the storage device is compromised and deleting file slices and an original encryption key from the storage of the storage device; after the deleting, generating a new encryption key different from the original encryption key; and instantiating a file recovery method to obtain the previously stored file slices on the compromised storage device from other non-compromised storage devices and to distribute new file slices encrypted using the new encryption key to non-compromised storage devices storing file slices encrypted using the old encryption key of the comprised storage device.

Abstract: Apparatus for automatically disconnecting a conductive polymer heater if an arcing fault occurs. A sensor conductor is incorporated into the heater, so that if an arcing fault occurs, the current through the sensor conductor increases and triggers a safety circuit to disconnect the heater. The sensor conductor is preferably insulated by an organic polymer which pyrolyses if an arcing fault occurs and thus permits current to flow between the sensor conductor and an electrode of the heater.