Data transfer apparatus and data transfer method

A data transfer method to be executed by a data transfer apparatus coupled to a network,

• the data transfer apparatus comprising:
• a first memory;
• a second memory;
• a search unit which is connected to the first memory and the second memory;
• and
• a data transmitting/receiving unit which is connected to the search unit to process data received from the network,
• the first memory holding information that associates a search key with an address,
• the second memory holding information that associates the address with verification information which is generated by a predetermined generation method based on at least a portion of the search key,
• the data transfer method comprising:
• generating, by the search unit, the search key based on the received data;
• obtaining, by the search unit, the address that is associated with the generated search key from the first memory;
• obtaining, by the search unit, the verification information that is associated with the obtained address from the second memory;
• verifying, by the search unit, the verification information that is generated by the predetermined generation method based on at least a portion of the generated search key with the verification information obtained from the second memory;
• and
• executing, by the data transmitting/receiving unit, processing based on a result of the verification.