SOURCE AUTHENTICATION METHOD AND A DEVICE THEREOF CAPABLE OF AUTHENTICATING A SOURCE BY USING SINGLE BUFFER HASH IN A MULTICAST ENVIRONMENT

摘要

PURPOSE: A source authentication method and a device thereof are provided to effectively authenticate a source and to minimize buffering loads in a reception side or a transmission side by transmitting data without time synchronization.;CONSTITUTION: An authentication device(10) of a transmission side includes a message buffer(11), a key value selection unit(12), a hash value generation unit(13), and a packet generation unit(14). A message buffer stores a message. A key value selection unit generates key values in advance by selecting a key value for generating a first hash value and by applying a single direction hash function to a transmission packet. A hash value generation unit generates the first hash value by applying a first hash function to a message included in a next packet by using a key value generated by the key value selection unit. The packet generation unit generates the transmission packet by including the first hash value.;COPYRIGHT KIPO 2013;[Reference numerals] (10) Authentication device for a transmitter; (11) Message buffer; (12) Key value selection unit; (13) Hash value generation unit; (14) Packet generation unit; (20) Authentication device for a receiver; (21) First packet buffer; (22) Second packet buffer; (23) Message verification unit; (24) Key value verification unit; (30) Packet transmission module; (40) Packet reception module; (AA) Packet