Abstract: Disclosed herein are an apparatus and method for providing sensor data in a sensor device based on a blockchain. A method for providing sensor data in a sensor device based on a blockchain may include creating a device record using encrypted device identification information, registering the device record in the blockchain, creating an event record using event information collected from a sensor, registering the header of the event record, including information about a link to the device record, in the blockchain, and distributing the body of the event record, the body being linked to the header of the event record.

Abstract: Disclosed are an apparatus and a method for Internet of Things (IoT) device security. The method includes unifying a port in a first IoT device for communication, receiving, by the first IoT device, a packet from a second IoT device through the port, identifying whether the packet in the first IoT device is in a preset packet form, verifying content of the packet in the first IoT device when the packet is in the preset packet form, and opening the port for providing a service in the first IoT device when the verifying of the packet content is successful.

Abstract: There is provided a small and light ozone generating apparatus capable of producing ozone with much less consumption of electric power. The present invention comprises a pulse generator for generating high-voltage pulses and a discharge chamber for inducing electrical discharge in response to the high-voltage pulses. The pulse generator includes an LC circuit for compressing square wave signals and generating impulses. The use of impulse greatly reduces electric power consumption and volume of ozone generating apparatus. Electrical discharge takes place between an electrode plate and grounded chamber wall. A sheet of oxide dielectric covers the chamber wall to prevent corrosion of chamber wall.

Abstract: There is provided a small and light ozone generating apparatus capable of producing ozone with much less consumption of electric power. The present invention comprises a pulse generator for generating high-voltage pulses and a discharge chamber for inducing electrical discharge in response to the high-voltage pulses. The pulse generator includes an LC circuit for compressing square wave signals and generating impulses. The use of impulse greatly reduces electric power consumption and volume of ozone generating apparatus. Electrical discharge takes place between an electrode plate and grounded chamber wall. A sheet of oxide dielectric covers the chamber wall to prevent corrosion of chamber wall.