MEASUREMENT DEVICE AND METHOD OF CONTROLLING THE SAME
First Claim
1. A measurement device comprising:
- a first measurement unit configured to measure first biological data at least k times, where k≧
2, to obtain any k first measurement values;
a distributed-signature generation unit configured to execute signature operations for the k first measurement values using any various k distributed-signature keys, respectively, to generate k distributed signatures, the k distributed-signature keys being capable of reconstructing a signature generation key only when all of the k distributed-signature keys are available;
a signature synthesis unit configured to synthesize the k distributed signatures together to reconstruct a signature; and
a steady state verification unit configured to verify, using a signature verification key corresponding to the signature generation key, whether or not the signature reconstructed by said signature synthesis unit is correct, where the correctness of the signature means that the k first measurement values are same values.
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Accused Products
Abstract
A measurement device includes: a first measurement unit (101) measuring first biological data at least k times (k≧2) to obtain any k first measurement values; a distributed-signature generation unit (104) executing signature operations for the k first measurement values using any various k distributed-signature keys, respectively, to generate k distributed signatures, where the k distributed-signature keys can reconstruct a signature generation key only when all of them are available; a signature synthesis unit (106) synthesizing the k distributed signatures together to reconstruct a signature; and a steady state verification unit (107) verifying, using a signature verification key corresponding to the signature generation key, whether or not the signature reconstructed by the signature synthesis unit is correct, where the correctness of the signature means that the k first measurement values are same values.
28 Citations
13 Claims
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1. A measurement device comprising:
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a first measurement unit configured to measure first biological data at least k times, where k≧
2, to obtain any k first measurement values;a distributed-signature generation unit configured to execute signature operations for the k first measurement values using any various k distributed-signature keys, respectively, to generate k distributed signatures, the k distributed-signature keys being capable of reconstructing a signature generation key only when all of the k distributed-signature keys are available; a signature synthesis unit configured to synthesize the k distributed signatures together to reconstruct a signature; and a steady state verification unit configured to verify, using a signature verification key corresponding to the signature generation key, whether or not the signature reconstructed by said signature synthesis unit is correct, where the correctness of the signature means that the k first measurement values are same values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of controlling a measurement device, said method comprising:
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measuring first biological data at least k times, where k≧
2, to obtain any k first measurement values;executing signature operations for the k first measurement values using any various k distributed-signature keys, respectively, to generate k distributed signatures, the k distributed-signature keys being capable of reconstructing a signature generation key only when all of the k distributed-signature keys are available; synthesizing the k distributed signatures together to reconstruct a signature; and verifying, using a signature verification key corresponding to the signature generation key, whether or not the signature reconstructed is correct where the correctness of the signature means that the k first measurement values are same values.
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12. A computer program recorded on a non-transitory computer-readable recording medium for use in a computer, the computer program causing the computer to execute:
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measuring first biological data at least k times, where k≧
2, to obtain any k first measurement values;executing signature operations for the k first measurement values using any various k distributed-signature keys, respectively, to generate k distributed signatures, the k distributed-signature keys being capable of reconstructing a signature generation key only when all of the k distributed-signature keys are available; synthesizing the k distributed signatures together to reconstruct a signature; and verifying, using a signature verification key corresponding to the signature generation key, whether or not the signature reconstructed is correct, where the correctness of the signature means that the k first measurement values are same values.
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13. An integrated circuit comprising:
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a first measurement unit configured to measure first biological data at least k times, where k≧
2, to calculate any k first measurement values;a distributed-signature generation unit configured to execute signature operations for the k first measurement values using any various k distributed-signature keys, respectively, to generate k distributed signatures, the k distributed-signature keys being capable of reconstructing a signature generation key only when all of the k distributed-signature keys are available; a signature synthesis unit configured to synthesize the k distributed signatures together to reconstruct a signature; and a steady state verification unit configured to verify, using a signature verification key corresponding to the signature generation key, whether or not the signature reconstructed by said signature synthesis unit is correct, where the correctness of the signature means that the k first measurement values are same values.
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Specification