Patent ID: 7535355

Claim:
A container, comprising: a) a vibration sensor; b) a processor, coupled to receive a signal from the vibration sensor and adapted to process the signal to detect a pattern of vibration characteristic of an unauthorized opening of the container, the processor comprising computer storage media storing a library comprising a plurality of event signatures, each event signature representing a frequency spectrum of an event signal generated by an event as detected at the vibration sensor, the plurality of event signatures including an event signature representing the unauthorized opening; and the processor being adapted to: form a plurality of frequency domain representations of the signal, each formed from a portion of the signal; compare each of the plurality of frequency domain representations of the signal to the plurality of event signatures; and detect the unauthorized opening of the container based on the result of the comparisons; and c) an interface, coupled to the processor and adapted to communicate an indication of whether the pattern was detected.