To provide information by increasing openness to another task while maintaining independence between tasks.

An information processing device comprises: a memory that has a plurality of areas including a first area and a second area; and a task execution unit that in order to cause a first task to execute processing using the first area, executes the first task while giving desired authority to access the first area, and in order to cause a second task to execute processing using the second area, executes the second task while giving desired authority to access the second area. The task execution unit further gives the first task only reading authority as authority to access the second area.