Device to device authentication method using blockchain

An Internet of Things (IoT) device, comprising:

• a transceiver transmitting and receiving radio signals;
• and
• a processor being operatively connected to the transceiver,
• wherein the processor is configured to:
• transmit, to a Blockchain Node, a registration request signal including a public key certificate of the IoT device and a universally unique identifier (UUID) of the IoT device,
• receive, from the Blockchain Node, a first certification identifier (ID) for the IoT device, wherein the first Certification ID is a newly generated block,
• receive a first encrypted signal from an onboarding tool (OBT), wherein the encrypted signal includes a second certification ID of the OBT and encrypted information being encrypted based on a private key of the OBT, and
• transmit, to the Blockchain Node, a verification request signal including the second certification ID of the OBT.

An onboarding tool (OBT), comprising:

• a transceiver transmitting and receiving radio signals;
• and
• a processor being operatively connected to the transceiver,
• wherein the processor is configured to:
• transmit, to a Blockchain Node, a registration request signal including a public key certificate of the OBT and a universally unique identifier (UUID) of the OBT,
• receive, from the Blockchain Node, a first certification identifier (ID) for the OBT, wherein the first Certification ID is a newly generated block,
• receive a first encrypted signal from an Internet of Things (IoT) device, wherein the encrypted signal includes a second certification ID of the IoT device and encrypted information being encrypted based on a private key of the IoT device, and
• transmit, to the Blockchain Node, a verification request signal including the second certification ID of the IoT device.