Information authentication method and information authentication system

Patent metadata

Field	Value
Publication number	US-9106636-B2
Application number	US-201013876267-A
Country	US
Kind code	B2
Filing date	Oct 29, 2010
Priority date	Oct 29, 2010
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

At a time of enrollment, a client terminal: generates a feature polynomial from biometric information for enrollment; multiplies the feature polynomial by a prescribed integer; stores a helper polynomial obtained by multiplying an inverse polynomial of a template polynomial, a polynomial having a small norm; and transmits the template polynomial to an authentication server. The authentication server stores the template polynomial in a storage unit. At a time of authentication, the client terminal: generates a feature polynomial from biometric information for authentication; multiplies the helper polynomial by the feature polynomial; adds a random polynomial having a small norm to the authentication polynomial; and transmits the authentication polynomial to the authentication server. The authentication server determines whether or not the biometric information for enrollment and for authentication can be authenticated, based on the result obtained by multiplying the authentication polynomial by the template polynomial.

First claim

The invention claimed is:

1. An information authentication method to authenticate information performed by a client terminal and an authentication server, comprising:
at a time of enrollment,
the steps, performed by the client terminal, of
acquiring information for enrollment via an input unit;
generating a first feature polynomial based on the information for enrollment;
generating a template polynomial that has an inverse polynomial which is modulo a prescribed integer and…

Assignees

• Takahashi Kenta
• Hitachi Ltd

Inventors

• Takahashi Kenta

Classifications

• H04L63/08 Primary

  Electricity · mapped topic

• G06F21/32

  Physics · mapped topic

• H04L9/3093

  Electricity · mapped topic

• H04L9/3231 Primary

  Electricity · mapped topic