Patent ID: 7471714

Claim:
A random number sequence sharing system comprising a plurality of random number sequence sharing apparatuses, wherein each random number sequence sharing apparatus comprises: a reception unit which receives a radio signal including a radio wave radiated from a pre-designated radio star, at a pre-designated observation time; a sending unit which sends the received radio signal to another random number sequence sharing apparatus; an acceptance unit which accepts a radio signal sent from said another random number sequence sharing apparatus; an analysis unit which separates the received radio signal and the accepted radio signal into a plurality of independent components according to independent component analysis; a selection unit which selects from the plurality of independent components obtained by the independent component analysis, two independent components which are temporally different from each other by an arrival time difference between an arrival time it takes for the radio wave radiated from the radio star to arrive at said random number sequence sharing apparatus and an arrival time it takes for the radio wave to arrive at said another random number sequence sharing apparatus; a sampling unit which bit-samples an average of a component obtained by delaying one of the two selected independent component that is temporally anterior by the arrival time difference and the selected independent component that is temporally posterior, with a predetermined precision; and an output unit which outputs a sequence of bit samples obtained by the bit-sampling, as a random number sequence to be shared with said another random number sequence sharing apparatus.