An information terminal configured to communicate with an information processing device, the information terminal comprising: an authentication policy setting unit configured to receive, from the information processing device, identification information and key information that have been generated by the information processing device that is to perform authentication of a user of the information processing device in association with an event that occurs in accordance with an operation of the information terminal, which is performed by the user, wherein the identification information identifies an authentication method performed using the information processing device; an authentication event storage unit configured to store the identification information, the key information and the event in association with each other; a communication unit configured: to transmit, when it is detected that the event occurs, the identification information stored in association with the event in the authentication event storage unit to the information processing device; and to receive an encrypted notification, including a result of the authentication of the user by the authentication method according to the identification information in the information processing device, from the information processing device; an authentication processing unit configured to decrypt the encrypted notification using the key information stored in the authentication event storage unit; and a processing unit configured, when the decrypted notification indicates that the result of the authentication of the user was a successful authentication, to execute, processing in accordance with the event that has occurred. an authentication policy setting unit configured to receive, from the information processing device, identification information and key information that have been generated by the information processing device that is to perform authentication of a user of the information processing device in association with an event that occurs in accordance with an operation of the information terminal, which is performed by the user, wherein the identification information identifies an authentication method performed using the information processing device; an authentication event storage unit configured to store the identification information, the key information and the event in association with each other; a communication unit configured: to transmit, when it is detected that the event occurs, the identification information stored in association with the event in the authentication event storage unit to the information processing device; and to receive an encrypted notification, including a result of the authentication of the user by the authentication method according to the identification information in the information processing device, from the information processing device; an authentication processing unit configured to decrypt the encrypted notification using the key information stored in the authentication event storage unit; and a processing unit configured, when the decrypted notification indicates that the result of the authentication of the user was a successful authentication, to execute, processing in accordance with the event that has occurred. to transmit, when it is detected that the event occurs, the identification information stored in association with the event in the authentication event storage unit to the information processing device; and to receive an encrypted notification, including a result of the authentication of the user by the authentication method according to the identification information in the information processing device, from the information processing device; an authentication processing unit configured to decrypt the encrypted notification using the key information stored in the authentication event storage unit; and a processing unit configured, when the decrypted notification indicates that the result of the authentication of the user was a successful authentication, to execute, processing in accordance with the event that has occurred.