Abstract: A person-to-person non-face-to-face identity verification system using wireless communication is disclosed. The non-face-to-face identity verification system according to the present invention mutually exchanges a first certificate signed with a user identifier and a private key of a terminal user and a second certificate signed with a user identifier and a private key of a terminal user of a second terminal from the second terminal, verifies the received certificates with a public key of each terminal registered on on/off-chain, combines the verified certificate and a self-generated certificate to generate an integrated certificate. Accordingly, since the electronically signed confirmations are exchanged with each other and verified with public keys registered on the on/off-chain, it is possible to exchange the verified certificates non-face-to-face.

Abstract: A digital ID storage and federation service model is disclosed. In the digital ID storage and federation service model according to the present invention, the custodian creates a federation ID (F-ID) mapped to a digital ID received from the issuer, delivers it to the holder, and stores it in a ledger for ID sharing. When the holder submits the F-ID to a service provider while requesting the service from the service provider, the service provider requests verification from the custodian, and when all ID transaction event history is recorded in a ledger for ID transaction, the custodian delivers that verification is normally completed to the service provider, and the service provider provides the requested service to the holder.

Abstract: Disclosed herein is a user identity sharing system utilizing a distributed ledger technology security platform. The present invention includes an OFF-CHAIN configured to operate as a regional or national blockchain within a single jurisdiction, in which one or more virtual asset service providers and one or more identity management service providers are participating; and an ON-CHAIN configured to operate as a global blockchain with no borders, in which one or more virtual asset service providers are participating, wherein user identity information of the OFF-CHAIN are shared as de-identified identity information between a virtual asset service provider participating in both the OFF-CHAIN and the ON-CHAIN and another virtual asset service provider participating in the ON-CHAIN, thus preventing forgery of user identity information, and sharing user identity information between virtual asset service providers, other blockchains, distributed ledger technology platforms, and existing IT systems.

Abstract: Disclosed is a method for sensor network authentication based on an XOR chain, which authenticates a transmitting node and a message in a sensor network including a central server, a plurality of transmitting nodes, and a plurality of receiving nodes, the method comprising the steps of: (a) receiving an initial key from the central server, generating a key chain from the initial key, generating a first key chain parameter sequence from the key chain, generating authentication information by XORing all the first key chain parameter sequence, and generating a second key chain parameter sequence by XORing each parameter of the first key chain parameter sequence with the authentication information, by each of the transmitting nodes; (b) transmitting first and second parameters of the same position in the first and second key chain parameter sequences of the transmitting node together with a message by the transmitting node; and (c) XORing the first and second parameters and comparing a result of the XOR operation