PROCESSING INFORMATION
First Claim
1. A method for processing information, said method comprising:
- dividing, by an apparatus, 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 which limits a totality of pieces of the N pieces being stored on the external storage device to the M pieces;
after said storing the M pieces, restoring the target information from at least K pieces of the N pieces, andafter said restoring, destroying D pieces of the M pieces in the external storage device, wherein D>
M−
K.
2 Assignments
0 Petitions
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 (K<M<N). After selecting the M pieces, the M pieces are stored in the external storage device which limits a totality of pieces of the N pieces being stored on the external storage device to the M pieces. After storing the M pieces, the target information is restored from at least K pieces of the N pieces after which D pieces of the M pieces in the external storage device are destroyed (D>M−K).
8 Citations
20 Claims
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1. A method for processing information, said method comprising:
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dividing, by an apparatus, 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 which limits a totality of pieces of the N pieces being stored on the external storage device to the M pieces; 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 (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. 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:
-
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, said external storage device storing the M pieces in the external storage device which limits a totality of pieces of the N pieces being stored on the external storage device to the M pieces; after said storing the M pieces, said apparatus restoring the target information from at least K pieces of the N pieces, and after said restoring, said external storage device destroying D pieces of the M pieces in the external storage device, wherein D>
M−
K. - View Dependent Claims (13, 14, 15, 16)
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17. A computer program product, comprising a computer readable storage device having computer readable program code stored therein, said program code containing instructions executable, by an external storage device or by both the external storage device and an information processing device, to implement 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, said external storage device storing the M pieces in the external storage device which limits a totality of pieces of the N pieces being stored on the external storage device to the M pieces; after said storing the M pieces, said apparatus restoring the target information from at least K pieces of the N pieces, and after said restoring, said external storage device destroying D pieces of the M pieces in the external storage device, wherein D>
M−
K. - View Dependent Claims (18, 19, 20)
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Specification