Abstract: Provided is a method of providing an artificial intelligence (AI)-based service without exposure of personal information, which includes receiving, by a client apparatus, a user query, performing, by the client apparatus, preprocessing on the user query to replace a target word corresponding to personal information in the user query with a corresponding replacement word, transmitting, by the client apparatus, the preprocessed user query to a service server for providing an AI-based service, and replacing, by the client apparatus, the replacement word in an answer corresponding to the user query that is received from the service server with the target word corresponding thereto.

Abstract: A method for generating a device-specific artificial intelligence model includes obtaining, by a hardware device, unique information of a specific device, generating, by the hardware device, a neuron activation matrix based on the unique information, setting, by the hardware device, a degree of activation for neurons by applying the neuron activation matrix to neurons of a neural network model, and performing, by the hardware device, fine-tuning on the neurons for which the degree of activation has been set using a positive dataset.

Abstract: Provided is a method of providing an artificial intelligence (AI)-based service without exposure of personal information, which includes receiving, by a client apparatus, a user query, performing, by the client apparatus, preprocessing on the user query to replace a target word corresponding to personal information in the user query with a corresponding replacement word, transmitting, by the client apparatus, the preprocessed user query to a service server for providing an AI-based service, and replacing, by the client apparatus, the replacement word in an answer corresponding to the user query that is received from the service server with the target word corresponding thereto.