Group security in machine-type communication

Abstract

If the related secure communication method is applied to the system which includes a plurality of the MTC devices, traffic in a network would increase in proportion to the number of MTC devices. A disclosed communication apparatus is connected to a network and a plurality of communication terminals, and includes: a group information sending unit for sending group information, which is received from the network; an access control unit for 1) receiving a reply from the communication terminal(s) which responded to the group information and 2) sending the reply to the network; and a temporary identifier and group key sending unit for sending a temporary identifier and a group key to the communication terminal which responded to the group information, when the communication apparatus received the temporary identifier and the group key from the network.

Dependencies are inferred from the claim text.