An information processing device includes a memory, a receiving unit, a decision unit, and a concealment unit. The memory stores a history of performing, on an image having an attribute, a process that conceals an area within the image. The receiving unit receives an image. The decision unit extracts from the memory a history of a process performed on an image having an attribute that matches an attribute of the received image, and on the basis of the extracted history of a process, decides a concealment area within the received image. The concealment unit conceals the concealment area decided by the decision unit.