A copyright protection algorithm based on differential privacy for deep fake fingerprint detection model (DFFDM) was proposed. realizing active copyright protection and passive copyright verification of DFFDM without weakening the performance of the original task. In the original task training. noise was added to introduce randomness. https://www.kaliboat.com/product-category/food-servicecommercial-kitchen-equipmentfood-preparation-equipmentcommercial-mixers/