A center configured to communicate with an OTA master configured to control software updating of a plurality of electronic control units installed in a vehicle includes: a communication device configured to receive, from the OTA master, identification information; a storage device storing propriety determination information used in propriety determination of determining whether the version of software implemented in each of the electronic control units is an implementation management version; and a processor configured to perform the propriety determination based on the identification information and the propriety determination information, and perform, by communicating with the OTA master, restoration control on at least one of the electronic control units regarding which a determination has been made that the version of the software is not the implementation management version.