The lifting transform reduces the number of lifting steps in lossless data compression while improving the overall rounding errors incurred in the real-to-integer conversion process at each of the lifting steps. When companion human and baggage portals are synchronized, baggage items belonging to a subject are not passed through to a secure area unless the subject is cleared by a companion human portal for passage. The first message instructs the remote device to discard a received data message. The at least one spring support is coupled between the top surface of the base and the pill tray. The DSP offers the speed associated with hardware implementation of the transforms and the flexibility of a software only implementation.