Abstract: An electronic apparatus for generating a homomorphic encrypted message includes: a processor configured to generate a mask homomorphic encrypted message by homomorphically comparing the homomorphic encrypted message with the index data in case that a calculation command of the predetermined function for the homomorphic encrypted message is input, generate an intermediate homomorphic encrypted message by homomorphically multiplying the generated mask homomorphic encrypted message by the function result data, generate a function-result encrypted message for the homomorphic encrypted message by computing sum of values in a plurality of slots of the intermediate homomorphic encrypted message.

Abstract: An electronic device is disclosed. The electronic device comprises: a memory for storing at least one instruction; and a processor for executing at least one instruction, wherein the processor executes the at least one instruction so as to, when an operation command for a homomorphic ciphertext is input, obtain an operation result by using a plaintext operation corresponding to the operation command and a plaintext corresponding to the homomorphic ciphertext, and output the obtained operation result in a manner corresponding to the operation command.

Abstract: An induction heating device according to an embodiment includes a rectifying circuit configured to rectify an AC voltage supplied from a power supply, a smoothing circuit configured to smooth a voltage output from the rectifying circuit, an inverter comprising a plurality of switches and configured to supply current to a working coil, a shunt resistor coupled between the smoothing circuit and the inverter, a drive circuit configured to supply switching signals to the plurality of switches provided in the inverter, respectively, and a controller configured to determine a driving frequency of the inverter and drive the working coil by supplying a control signal based on the driving frequency to the driving circuit.

Abstract: An electronic device is disclosed. The electronic device comprises: a memory for storing at least one instruction; and a processor for executing at least one instruction, wherein the processor executes the at least one instruction so as to, when an operation command for a homomorphic ciphertext is input, obtain an operation result by using a plaintext operation corresponding to the operation command and a plaintext corresponding to the homomorphic ciphertext, and output the obtained operation result in a manner corresponding to the operation command.