Patent ID: 8032647

Claim:
An Open Mobile Alliance (OMA) device management method performed by a mobile terminal cooperating with plural servers including a broadcast server for broadcasting a service guide and a provisioning server for broadcasting a device management (DM) message, the method comprising: receiving the service guide that is broadcast from the broadcast server, the service guide including data required for connection and authentication with respect to the provisioning server that is broadcasting messages for device management (DM), the service guide including information related to a broadcasting service, session description information, connectivity information, and a target group ID (identity), the target group ID being identified according to an area to which a device management client belongs or a service method adopted by the device management client; establishing a DM session with the provisioning server using the received service guide; receiving a DM message that is broadcast from the provisioning server via a broadcast channel, wherein the DM message includes a group ID for a plurality of terminals belonging to a specific group, the group ID used for controlling the plurality of terminals via the DM message that was broadcast from the provisioning server; and performing a DM message reliability verification procedure including comparing the target group ID included in the service guide received from the broadcast server with the group ID included in the DM message received from the provisioning server, such that the mobile terminal selectively processes the DM message intended for said mobile terminal among a plurality of DM messages broadcast from the provisioning server, wherein the service guide further includes at least one of certificate information and an OCSP (Online Certificate Status Protocol) response, wherein the DM message is received together with an electronic signature, and wherein the DM message reliability verification procedure further includes comparing a digest value obtained from decrypting an electronic signature which is extracted from the certificate information included in the service guide with a digest value obtained from decrypting the electronic signature received together with the DM message if the target group ID included in the service guide is matched with the group ID included in the received DM message.