| 摘要 |
A communication monitoring apparatus includes a session extracting unit which extracts a packet in a session established between a pair of a transmitting device and a receiving device from a plurality of packets, a lead-packet extracting unit which extracts a lead packet including control information on communication between the transmitting device and the receiving device from the packet, a storage unit in which an unauthorized signature is stored, a verification unit which performs verification between the lead packet and the unauthorized signature, and an output unit which supplies a monitoring result indicating that the session extracted by the session extracting unit is an unauthorized communication when the lead packet includes a portion matched with the unauthorized signature.
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