METHOD AND SYSTEM FOR PROCESSING INFORMATION
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Accused Products
Abstract
A method and system for processing information. An apparatus divides target information into N pieces of divided data using a secret sharing scheme in which a predetermined number (K) of pieces of the N pieces of divided data is required to restore the target information, wherein N>K. The apparatus is an information processing device or an external storage device. The apparatus selects M pieces from the N pieces, wherein K≦M<N. After selecting M pieces, the M pieces are stored in the external storage device. After storing the M pieces, the target information is restored from at least K pieces of the N pieces. After the restoring, D pieces of the M pieces in the external storage device are destroyed, wherein D>M−K.
20 Citations
40 Claims
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1-15. -15. (canceled)
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16. A method for processing information, said method comprising:
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an apparatus dividing target information into N pieces of divided data using a secret sharing scheme in which a predetermined number (K) of pieces of the N pieces of divided data is required to restore the target information, wherein N>
K, and wherein the apparatus is an information processing device or an external storage device;said apparatus selecting M pieces from the N pieces, wherein K≦
M<
N;after said selecting M pieces, storing the M pieces in the external storage device; after said storing the M pieces, restoring the target information from at least K pieces of the N pieces, and after said restoring, destroying D pieces of the M pieces in the external storage device, wherein D>
M−
K. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A system comprising an external storage device and an information processing device, said information processing device and said external storage device configured to perform a method for processing information, said method comprising:
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an apparatus dividing target information into N pieces of divided data using a secret sharing scheme in which a predetermined number (K) of pieces of the N pieces of divided data is required to restore the target information, wherein N>
K, and wherein the apparatus is the information processing device or the external storage device;said apparatus selecting M pieces from the N pieces, wherein K≦
M<
N;after said selecting M pieces, storing the M pieces in the external storage device; after said storing the M pieces, restoring the target information from at least K pieces of the N pieces, and after said restoring, destroying D pieces of the M pieces in the external storage device, wherein D>
M−
K. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification