AUTHENTIFICATION METHODS AND SYSTEM BASED ON PROGRAMMABLE BLOCKCHAIN AND ONE-ID

摘要

The present invention provides a method and system for authenticating a user, wherein a user ID and a user public key are registered in a programmable block chain to execute a user authentication program, thereby providing safe user authentication. In addition, access to the block chain is made through an authentication server (or a management server), such that servers of several service providers can check user information without occurrence of respective transaction of the block chains. Furthermore, the information on a user whose identity is checked through a certificate authority is encrypted and then stored in the block chain such that identity of the user does not need to be checked whenever the user authentication is performed and there is no risk of user information leakage even though the server of the service provider is hacked. Moreover, when a programmable block chain such as Ethereum is used, it is possible to ensure integrity of a user authentication program as well as that of user information, and at the same time even an authentication server is not able to recklessly manipulate the user authentication program of the block chain. According to the present invention, a user can use only one ID to be able to log on several institution servers, provide user information and authenticate user information, such that the user information is not dispersed over several institution servers, thereby easily managing history of user information provision and eliminating inconvenience that a user should memorize an ID and a password and input each and every user information again whenever changing all kinds of user information such as an address, terminal information, server information, a telephone number or a personal document or subscribing to service of a service provider.