Abstract: A digital electronic device, which performs authentication using a blockchain, includes: a physical node that is connected to a physical blockchain network and a virtual blockchain network constructed in the digital electronic device, and has attribute information including pubic key information, private key information, a unique identifier (ID), and a password available for encryption of a block including transaction data through the blockchain networks; at least one virtual node that is connected to the virtual blockchain network and has attribute information including pubic key information, private key information, a unique identifier (ID), and a password available for encryption of a block including transaction data through the virtual blockchain network; and a short range communication interface module configured to be able to directly communicate with a user communication device without passing through a gateway.

Abstract: A digital electronic device, which performs authentication using a blockchain, includes: a physical node that is connected to a physical blockchain network and a virtual blockchain network constructed in the digital electronic device, and has attribute information including pubic key information, private key information, a unique identifier (ID), and a password available for encryption of a block including transaction data through the blockchain networks; at least one virtual node that is connected to the virtual blockchain network and has attribute information including pubic key information, private key information, a unique identifier (ID), and a password available for encryption of a block including transaction data through the virtual blockchain network; and a short range communication interface module configured to be able to directly communicate with a user communication device without passing through a gateway.

Abstract: A door lock device including a housing coupled to a predetermined portion of the door and having first penetrating holes formed in centers of both lateral sides, respectively, corresponding to front and rear surfaces of the door. A second penetrating hole formed in a wall of the housing. A body unit in the first penetrating hole to reciprocate forward and backward. A hinge traverse a longitudinal center of the body unit. A third penetrating hole is formed in a center of a bottom surface of the body unit. A door lock unit in the housing and body unit. Triangle-shaped holes are formed in both walls of the door lock unit. The door lock unit operating a latch for fixing the door while reciprocated the second penetrating hole and the third penetrating hole by the hinge along the reciprocating movement of the body unit.