| 摘要 |
PROBLEM TO BE SOLVED: To specify a file disclosure origin node with small network traffic in a P2P file sharing network. SOLUTION: A connection part (201) receives a key including the address of a file disclosure origin node from the other node, and a comparison part (203) compares the address of the key with the address of a node which is connected at present, and when both the addresses are the same, a counter value is increased by 1, and an operation to receive the key from the node connected at present and an operation to compare the addresses is repeated until the counter value reaches a fixed value, and when the counter value reaches the fixed value, a decision part (205) specifies the node connected at present is a transmission source, and on the other hand, the decision part acquires the key from the node having the address shown by the key, and specifies the transmission source of the information with small network traffic by tracing only the nodes whose keys have been rewritten. COPYRIGHT: (C)2009,JPO&INPIT
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