COMMUNICATION APPARATUS, SYSTEM, CONTROL PROGRAM, AND CONTROL METHOD

摘要

[Problem] The objective of the invention is to arrange that even in a case where a function to prevent secret information, which has been stored in a communication apparatus, from being leaked has been enabled, the function be disabled if a vibration is of a case where the function is not necessary. [Solution] A communication apparatus, which is one of a plurality of communication apparatuses constituting a communication network, is characterized by comprising: a detection unit that detects a vibration of the communication apparatus; a communication unit that receives, from another one of the plurality of communication apparatuses, a notification indicating that a vibration has been detected at the other communication apparatus; and a control unit that, when the detection unit has detected a vibration, causes the state of the communication apparatus to transition to a warning state in which the information managed by the communication apparatus is protected and that, when it has been determined, on the basis of the notification, that the vibration is of an earthquake, cancels the warning state.