Abstract: A refrigerant storage reservoir, connected by valves to the high and low pressure lines of a refrigeration system, and controlled by a microprocessor based system that monitors temperatures and pressures, provides a means of regulating the overall amount of refrigerant charge in a heating or cooling system to optimize economy or performance during operation. Reference temperature and pressure data profiles, permanently stored in memory, are compared with actual data collected while the refrigeration system is operating. If a reduction of refrigerant charge is indicated, a valve on the high pressure side of the refrigeration system is opened to allow excess refrigerant to flow into the storage reservoir. If an increase in refrigerant charge is indicated, a valve on the low pressure side of the refrigeration system is opened to allow refrigerant to flow from the reservoir into the operating loop of the refrigeration system.

Abstract: An encryption control system to process an input transport data stream into an output transport data stream includes an input demultiplexer, a first secure microprocessor, a second secure microprocessor and an output multiplexer. The input transport data stream includes first entitlement managment message data. The input demultiplexer culls the first entitlement managment message data from the input transport data stream, the first entitlement management message data including an encrypted multi-session key. The first secure microprocessor processes the first entitlement management message data to recover the multi-session key by decrypting the encrypted multi-session key using a first algorithm. The second secure microprocessor re-encrypts the multi-session key using a second algorithm and formats second entitlement management message data based on the first entitlement management message data with the re-encrypted multi-session key substituted for the encrypted multi-session key.