Patent ID: 8335918
Filing Date: 2012-12-18
Classification: H04L

Abstract:
1. A medium access control (MAC) frame provision method for establishing security in a network, the method comprising the steps of: generating a MAC frame comprising a MAC header, a payload field, and a frame check sequence (FCS) field, the MAC header providing general information about communication, the payload field including relevant main data according to a frame type defined in the MAC header; generating and inserting a disguised decoy data sequence number (DSN) into the MAC header; generating and inserting a real DSN comprising a corresponding transmission sequence number of the MAC frame, into the payload field; encrypting the payload field with a predetermined link key shared by a plurality of nodes in the network, and transmitting the MAC frame including the encrypted payload field by a first counterpart node to a second counterpart node; receiving a MAC ACK frame from the second counterpart node acknowledging reception of the transmitted MAC frame; comparing a DSN in the received MAC ACK frame with the real DSN; and performing authentication of the second counterpart node upon determining that the DSN in the received MAC ACK frame is equal to the real DSN as a result of the comparison.