Security is simply and safely secured when communication is performed by an information processing device including: a communication unit configured to wirelessly communicate with another terminal; an identification information acquisition unit configured to acquire first identification information that is acquired through the communication unit and encrypted for specifying the other terminal, and that is decrypted with a first decryption key managed in a network service; and a key acquisition unit configured to acquire a first encryption key associated with the first identification information in the network service when second identification information for specifying an own terminal is associated with the first identification information in the network service. The communication unit transmits information encrypted with the acquired first encryption key to the other terminal.