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Title:
KEY GENERATION DEVICE, KEY UTILIZATION DEVICE, AND KEY GENERATION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/106334
Kind Code:
A1
Abstract:
A key generation device for achieving high-accuracy authentication for biometric encryption and biometric signatures that are based on feature vectors in a high-dimensional Euclidean space. The key generation device: stores a first feature vector that indicates the features of first biological information and parameters for specifying a sphere packing arrangement that has a density that is less than 1 but greater than a prescribed value or a sphere covering arrangement that has a density that is at least 1 but lower than a prescribed value; specifies a sphere packing arrangement or a sphere covering arrangement on the basis of the parameters; selects a first point that is included in the specified sphere packing arrangement or sphere covering arrangement; performs a prescribed first conversion on the first point to generate a first key; and generates a template that corresponds to the first biological information on the basis of the first feature vector and the first point.

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Inventors:
TAKAHASHI KENTA (JP)
Application Number:
PCT/JP2020/035536
Publication Date:
June 03, 2021
Filing Date:
September 18, 2020
Export Citation:
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Assignee:
HITACHI LTD (JP)
International Classes:
H04L9/08; G06F21/32; H04L9/32
Foreign References:
JP2019216479A2019-12-19
Other References:
GILKALAYE BABAK POOREBRAHIM; RATTANI AJITA; DERAKHSHANI REZA: "Euclidean-Distance Based Fuzzy Commitment Scheme for Biometric Template Security", 2019 7TH INTERNATIONAL WORKSHOP ON BIOMETRICS AND FORENSICS (IWBF), IEEE, 2 May 2019 (2019-05-02), pages 1 - 6, XP033564374, DOI: 10.1109/IWBF.2019.8739177
DODIS, Y.REYZIN, L.SMITH, A.: "Advances in Cryptology - EUROCRYPT 2004. Lecture Notes in Computer Science", vol. 3027, SPRINGER, article "Fuzzy Extractors: How to Generate Strong Keys from Biometrics and Other Noisy Data"
See also references of EP 4068676A4
Attorney, Agent or Firm:
TOU-OU PATENT FIRM (JP)
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