Title:
INFORMATION COLLATION SYSTEM AND INFORMATION COLLATION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/070275
Kind Code:
A1
Abstract:
Provided is an information collation system capable of collating two pieces of information without disclosing the same and disabling collation using information other than registered information. A common key generation device generates a common key. A storage information generation device acquires registered information and an identifier capable of identifying the registered information, generates a first individual key from the common key and the identifier, and uses the common key and the first individual key to generate storage information obtained by linearly transforming the registered information. A collation information masking device acquires collation information, and uses an encryption key to generate masked collation information obtained by masking the collation information. A masked-state similarity degree calculation device calculates the degree of masked-state similarity from the storage information and the masked collation information. A decoding device generates a second individual key from the common key and the identifier, and calculates the degree of similarity between the registered information and the collation information from the degree of masked-state similarity, a decoding key corresponding to the encryption key, the common key, and the second individual key.
Inventors:
FUKUDA HARUNA (JP)
ISSHIKI TOSHIYUKI (JP)
NARA MASAHIRO (JP)
TAMIYA HIROTO (JP)
OKAMURA TOSHIHIKO (JP)
ISSHIKI TOSHIYUKI (JP)
NARA MASAHIRO (JP)
TAMIYA HIROTO (JP)
OKAMURA TOSHIHIKO (JP)
Application Number:
PCT/JP2019/039781
Publication Date:
April 15, 2021
Filing Date:
October 09, 2019
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G06F21/32
Domestic Patent References:
| WO2011052056A1 | 2011-05-05 |
Foreign References:
| US20150012742A1 | 2015-01-08 | |||
| JP2016131335A | 2016-07-21 | |||
| JP2017076839A | 2017-04-20 |
Other References:
TAMIYA, HIROTO ET AL.: "Online Secret Biometric Authentication Method in Which Clients Have Templates", PROCEEDINGS OF 2019 SYMPOSIUM ON CRYPTOGRAPHY AND INFORMATION SECURITY (SCIS 2019, 15 January 2019 (2019-01-15), pages 1 - 7
Attorney, Agent or Firm:
KAJITA, Kuniyuki et al. (JP)
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