Patent ID: 7961614

Claim:
An information processing device comprising: frame acquiring means for acquiring a frame that is a predetermined unit of data transmission using a signal transmitted via a network, said frame including a destination address and a check sequence code; computing means for computing: (i) a check sequence code based on data included in the acquired frame in a predetermined manner; and (ii) a message digest of the destination address included in the acquired frame, the generated message digest being used for message authentication performed between terminals for transmitting and receiving the frame; checking means for checking whether the acquired frame is corrupted by determining whether the computed check sequence code coincides with the check sequence code included in the acquired frame; storing means for storing a table including message digests computed in a predetermined manner based on a plurality of pieces of data representing addresses of frames to be received by the information processing device; and determining means for determining whether the acquired frame should be received or removed by determining whether the computed message digest of the destination address included in the acquired frame coincides with any one of the message digests included in the stored table; wherein said acquired frame is removed if it is determined that the computed check sequence code does not coincide with the check sequence code included in the acquired frame; and wherein said acquired frame is removed if it is determined that the computed message digest does not coincide with any one of the message digests included in the table.