SECURE UPGRADE OF A MOBILE DEVICE WITH AN INDIVIDUAL UPGRADE SOFTWARE OVER THE AIR

摘要

The invention concerns a method for securely upgrading a mobile device (4) with an individual upgrade software (28), the individual upgrade software (28) remaining unusable by a mobile device (4) as long as the individual upgrade software (28) has not been activated The method comprises: - transmitting its unique identification number to the mobile device management apparatus; - calculating a mobile device encryption identity and a management apparatus encryption identity; - transmitting only the individual upgrade software (28) and the calculated management apparatus encryption identity; - the mobile device calculating an activation encryption identity and an activation decryption identity; - comparing the calculated activation decryption identity to the activation encryption identity; and - activating the individual upgrade software (28) for use by the mobile device (4) as a result of a positive comparison.