Patent ID: 11947673
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 5:
6. A method implemented by a mobile terminal, wherein the method comprises:
receiving, from a server, over-the-air (OTA) data comprising header information and differential encrypted data, wherein the header information comprises either differential data encryption header information or the differential data encryption header information and destination data encryption header information, wherein the differential encrypted data is based on encrypting differential data or encrypting and signing the differential data;
verifying, based on the destination data encryption header information, a signature of the differential encrypted data;
decrypting the differential encrypted data based on the differential data encryption header information to obtain the differential data;
obtaining an old version of original data of a system software;
integrating a new version of the original data based on the differential data and the old version of the original data; and
upgrading an old version of the system software to a new version of the system software using the new version of the original data.