An electronic lock may transmit advertising that the electronic lock is available for communication. A smartphone may establish communication with the electronic lock in response to the advertising. The electronic lock may transmit an encrypted lock identification to the smartphone. The smartphone may transmit the lock identification and a smartphone identification to a cloud. In response, the cloud transmits to the smartphone an encrypted update such as the user database, time and date, and lock configuration. The smartphone may transmit the encrypted update to the electronic lock.