Title:
CONTRACT AGREEMENT METHOD, AGREEMENT VERIFICATION METHOD, CONTRACT AGREEMENT SYSTEM, AGREEMENT VERIFICATION DEVICE, CONTRACT AGREEMENT DEVICE, CONTRACT AGREEMENT PROGRAM AND AGREEMENT VERIFICATION PROGRAM
Document Type and Number:
WIPO Patent Application WO2017010455
Kind Code:
A1
Abstract:
The present invention leaves a contract trail in a block chain by using a simple method while obtaining agreement between relevant parties and also retaining the format of one electronic signature per single transaction. In addition, the present invention maintains reliability while leaving a contract trail in a block chain by using a simple method while obtaining agreement between relevant parties and also retaining the format of one electronic signature per single transaction. The transactions of an issuer side terminal 1 relating to a contract agreement, an agreeing party side terminal 3a and an agreeing party side terminal 3b are chained, and the last agreeing party side terminal 3b generates a transaction directed to the issuer side terminal 1 of the contract issuing source. In addition, the terminals generate, in advance, a key pair for encoding the contract, and send the encoding keys to the terminal of a sender of the transaction. The sender's terminal uses the encoding keys of a receiver of the transaction to encode the contract to be included in the transaction of the own terminal user.
Inventors:
WATANABE HIROKI (JP)
AKUTSU AKIHITO (JP)
MIYAZAKI YASUHIKO (JP)
NAKADAIRA ATSUSHI (JP)
FUJIMURA SHIGERU (JP)
AKUTSU AKIHITO (JP)
MIYAZAKI YASUHIKO (JP)
NAKADAIRA ATSUSHI (JP)
FUJIMURA SHIGERU (JP)
Application Number:
PCT/JP2016/070415
Publication Date:
January 19, 2017
Filing Date:
July 11, 2016
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G06Q20/38; G06F21/33; G06Q10/06; H04L9/32
Domestic Patent References:
| WO2001052128A1 | 2001-07-19 |
Foreign References:
| JP2002170058A | 2002-06-14 | |||
| JP2002049590A | 2002-02-15 |
Other References:
"EC - Kessai no Shin Model", PROJECT DESIGN, 1 April 2015 (2015-04-01), pages 42 - 43, XP009508375
HIROYUKI TOTAKE: "Bit Coin' wa Honto ni ''Abunai'' noka Kessai System to shite no ''Kaso Tsuka'' no Jitsuryoku", CARDWAVE, vol. 27, no. 3, 1 June 2014 (2014-06-01), pages 20 - 25, XP009508386
HIROYUKI TOTAKE: "Bit Coin' wa Honto ni ''Abunai'' noka Kessai System to shite no ''Kaso Tsuka'' no Jitsuryoku", CARDWAVE, vol. 27, no. 3, 1 June 2014 (2014-06-01), pages 20 - 25, XP009508386
Attorney, Agent or Firm:
MIYOSHI, Hidekazu et al. (JP)
Download PDF: