Telefonaktiebolaget Lm Ericsson (Publ)

Sony Ericsson Mobile Communications Ab

Carl Gustavsson

Stefan Mikael Andersson

Lars Novak

Kristina Ahlgren

Jörgen Birkler

Stefan Dahl

Gustaf Lööf

Authentication of an electronic communication apparatus capable of communicating data messages with a server according to a synchronization protocol includes providing an authentication method indicator that specifies an authentication method according to which the authentication is to be executed. The authentication method indicator is incorporated into a message that includes a plurality of authentication capabilities of the communication apparatus. The message is transmitted to the server according to an authentication protocol of the synchronization protocol.

Security protection for data communication

A checksum is calculated on a database stored in a SIM card when changes are made to a database stored therein. This checksum can be stored in a mobile phone, e.g., with the change log. When synchronization between devices is to be performed, another checksum can be calculated on the database stored in the SIM card. If the stored checksum does not match the calculated checksum, then a change has occurred in the contents of the database that is not reflected in the change log. Accordingly, a full synchronization process can be performed wherein the database records in each device can be compared. If, on the other hand, the checksums match, then the change log accurately reflects any changes made to the database stored in the SIM card and the synchronization process can proceed more expediently using the change log.

Method and apparatus for synchronizing databases in portable communication devices

Growing community of inventors

Lund, Sweden

Carl Gustavsson