Method of encrypting control signaling
A control signal and group control technology, which is applied in the direction of encryption devices with shift registers/memory, wireless communication, security communication devices, etc., can solve the problems of not performing key exchange, etc., and achieve security weaknesses that prevent the destruction of confidentiality, Reduce the effect of excessive load
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[0208]
[0209] In the following description, a method of selectively encrypting a control signal applicable to an embodiment of the present invention is explained.
[0210] In the IEEE 802.16e system, the mobile station and the base station use the authorization key shared by both the mobile station and the base station to generate CMAC (cipher-based message authentication code) keys and HMAC (hash message authentication code) keys for control signaling protection. code) key.
[0211] Each of the mobile station and the base station can generate a message authentication code (MAC) using a CMAC key and / or a HAMC key. Also, the mobile station and the base station can ensure the integrity of the corresponding control signal by exchanging the control signal in a manner of attaching a message authentication code (MAC) to the control signal.
[0212] Meanwhile, in case the base station and the mobile station use AES-CCM, the mobile station and the base station can ensure the inte...
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