A Simulation Study of P2P File Pollution Prevention Mechanisms

• Main Authors: Chia-Li Huang, 黃家俐
• Other Authors: 黃寶儀
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/27812383783862646223

碩士 === 臺灣大學 === 電機工程學研究所 === 95 === In order to penalize unauthorized sharing of copyright-protected material in the Peer-to-Peer (P2P) systems, the music and film industries inject corrupted copies of the hit music and video clips to confuse the users and make it difficult for them to download a working copy of the desired file. Such practice is rather common and can be used by malicious users to compromise the data integrity of the P2P systems. This coexistence of corrupted and correct copies of files is referred to as file pollution in P2P systems. It does not only decrease the system performance, but also generates a large amount of traffic due to repeated downloads of the corrupted files. In this work, we evaluate the efficiency of two types of anti-pollution mechanisms on two popular pollution attacks. We also investigate how user slackness and awareness to the files influence the efficacy of the anti-pollution mechanisms. Finally, we propose a hybrid mechanism for more robust and efficient P2P system pollution protection.