Contract agreement method, agreement verification method, contract agreement system, agreement verification device, contract agreement device, contract agreement program and agreement verification program
US10848315B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2016 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Apr 30, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods, systems, and devices for leaving evidence of a contract on a blockchain with a simple method while having agreements made among the involved parties, maintaining the mode of one electronic signature per transaction, and maintaining credibility. Transactions of an issuing-party terminal, an agreeing-party terminal, and an agreeing-party terminal involved in contract agreement are linked as a chain, and the agreeing-party terminal at the end generates a transaction directed to the issuing-party terminal who has issued the contract. Each of these terminals previously generates a key pair for encryption of the contract and transmits the encryption key to a terminal which is its transaction sender. Then, this sender terminal encrypts a contract to be included in a transaction of the user of the sender terminal using the encryption key of the receiver of the transaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.