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1. (WO2018179293) VERIFICATION INFORMATION ADDING DEVICE, VERIFICATION DEVICE, INFORMATION MANAGEMENT SYSTEM, METHOD, AND PROGRAM

Pub. No.:    WO/2018/179293    International Application No.:    PCT/JP2017/013473
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 31 01:59:59 CEST 2017
IPC: H04L 9/32
G06F 21/60
G06F 21/64
G06Q 20/38
Applicants: NEC CORPORATION
日本電気株式会社
Inventors: INOKUCHI Masaki
井ノ口 真樹
Title: VERIFICATION INFORMATION ADDING DEVICE, VERIFICATION DEVICE, INFORMATION MANAGEMENT SYSTEM, METHOD, AND PROGRAM
Abstract:
This verification information adding device (51) is provided with a nonce setting means (511) for performing a setting process in which: in order for a process value obtained when a one-way function is applied to a first data block having a prescribed data structure that has a nonce area in which is set a nonce that is verification information, or applied to data based on the first data block, to satisfy a prescribed rule, a nonce is set to a prescribed nonce area of the first data block; and a value is set to the nonce area and the process value is actually calculated, whereby the nonce is set, the nonce setting means (511) performing a prescribed data process, in which a secret key of a host device is used, on a prescribed data area of the first data block that includes the nonce area each time a value is set to the nonce area in the setting process or each time a nonce that satisfies the rule is set to the nonce area by the setting process.