Patent ID: 7564353
Filing Date: 2009-07-21
Classification: G06Q

Abstract:
1. A method for preventing alteration of event histories for objects held in a repository for a period of time, said objects being sensitive to events experienced thereby, said method comprising: a) sensing an event experienced by a said object; b) recording an event signal that defines the sensed event; c) transmitting a temporally ordered series of said event signals to a data storage apparatus, said data storage apparatus being operable to store said temporally ordered series of said event signals; and d) safeguarding said data storage apparatus against alteration of said stored series of event signals wherein said sensing step (a) and recording step (b) are carried out by associating a tag with said object, said tag comprising an event sensor operable to record an event signal for describing an event experienced by said object, a data storage device operable to store data comprising identification data for identifying said radio frequency tag, said tag being operable to provide data signals comprising said event signal and an identification signal based upon said identification data, and an energy source for activating said event sensor and said data storage device.