Title:
LINEAR SKETCHING SYSTEM, DEVICE, RECOGNITION METHOD, PROGRAM AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2020/174516
Kind Code:
A1
Abstract:
This invention provides a linear sketching system which performs determination of the proximity to data of biological feature amounts extracted from fuzzy information sources, on the basis of hamming distance. A generating device comprises: a key conversion unit which converts an inputted key into an encoded key using an encoding function of an error correcting code; and a sketch generation unit which generates a sketch by performing a first synthesis conversion with respect to the inputted fuzzy data and the encoded key. A restore device comprises: a sketch input unit which inputs a first sketch and a second sketch; a sketch synthesis unit which performs a second synthesis conversion of the first and second sketches to determine a synthesized sketch; and a key differential restore unit which calculates the difference between two keys used to generate the first and second sketches on the basis of the synthesized sketch.
Inventors:
FUKUDA HARUNA (JP)
Application Number:
PCT/JP2019/006971
Publication Date:
September 03, 2020
Filing Date:
February 25, 2019
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H04L9/08; G06F21/32; H04L9/32
Domestic Patent References:
| WO2014050952A1 | 2014-04-03 | |||
| WO2014192086A1 | 2014-12-04 |
Foreign References:
| US20030219121A1 | 2003-11-27 | |||
| JP2017195567A | 2017-10-26 | |||
| JP2010034967A | 2010-02-12 | |||
| JP2015226323A | 2015-12-14 |
Other References:
HIDANO, SEIRA ET AL.: "Evaluation of Security for Protected Template in Biometric Cryptosystem Using Fuzzy Commitment Scheme", IPSJ SIG TECHNICAL REPORT., vol. 54, no. 11, November 2013 (2013-11-01), pages 2383 - 2391
TAKAHASHI, K. ET AL.: "Signature Schemes with a Fuzzy Private Key", CRYPTOLOGY EPRINT ARCHIVE, 2 April 2018 (2018-04-02), pages 1 - 51, XP047333111, Retrieved from the Internet [retrieved on 20190517]
TAKAHASHI, K. ET AL.: "Signature Schemes with a Fuzzy Private Key", CRYPTOLOGY EPRINT ARCHIVE, 2 April 2018 (2018-04-02), pages 1 - 51, XP047333111, Retrieved from the Internet
Attorney, Agent or Firm:
KATO, Asamichi (JP)
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