Abstract: A blockchain based integrated identity and authentication management service method is a method of allowing a user who is subscribed to a provider to use a partner service through a virtual ID registered in a private blockchain managed and operated by the provider without subscribing to the partner service, in order to use the partner service associated with the provider. The user creates the virtual ID and registers the virtual ID in the private blockchain through the provider, and the user sends the virtual ID to a partner and requests a service. The partner verifies the virtual ID through the private blockchain, acquires a public key of the user from the private blockchain, and provides the service to the user via mutual authentication with the user, wherein additional personal information required is obtained through a separate personal information database held by the provider, not by the private blockchain.

Abstract: The present invention relates to a light-emitting device for light amplification using graphene quantum dots and a method of manufacturing the same, which includes a first conductive semiconductor base layer; a plurality of nanowires disposed on the first conductive semiconductor base layer and including a first conductive semiconductor core, an active layer, and a second conductive semiconductor layer sequentially formed from inside to outside; and a graphene quantum dot coating layer disposed on one or both of a surface and an interior of the nanowire, thereby providing a light-emitting device which maximizes light extraction and light amplification.

Abstract: The present invention relates to a light-emitting device for light amplification using graphene quantum dots and a method of manufacturing the same, which includes a first conductive semiconductor base layer; a plurality of nanowires disposed on the first conductive semiconductor base layer and including a first conductive semiconductor core, an active layer, and a second conductive semiconductor layer sequentially formed from inside to outside; and a graphene quantum dot coating layer disposed on one or both of a surface and an interior of the nanowire, thereby providing a light-emitting device which maximizes light extraction and light amplification.