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PCSP: A Probable Concurrent Secure and Portable Peer-to-Peer Protocol

PCSP: A Probable Concurrent Secure and Portable Peer-to-Peer Protocol. Authors: Graciela Perera and Robert Gilliland Source: 2009 Ninth Annual International Symposium on Applications and the Internet, pp. 275-277, 2009 Speaker: Shu-Fen Chiou ( 邱淑芬 ). Problem.

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PCSP: A Probable Concurrent Secure and Portable Peer-to-Peer Protocol

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  1. PCSP: A Probable Concurrent Secure and PortablePeer-to-Peer Protocol Authors: Graciela Perera and Robert Gilliland Source: 2009 Ninth Annual International Symposium on Applications and the Internet, pp. 275-277, 2009 Speaker: Shu-Fen Chiou (邱淑芬)

  2. Problem • Gnutella protocol does not provide security.

  3. Requirements • Authentication • Confidentiality and Integrity (Using DH protocol) • Portable (Implement by Java)

  4. Proposed method Alice Bob 1.Generate a Compute ga 1.Generate b Compute gb 2. Bloom filter with IP address 2. Bloom filter with IP address 3. Hiding <bloom filter, IP after bloom filter, ga> in the first four bytes in an image by LSB 3. Hiding <bloom filter, IP after bloom filter, gb> in the first four bytes in an image by LSB Stego-image 4. Extract <bloom filter, IP after bloom filter, gb> 5. Authentication by IP 6. Generate session key K=(gb mod p)a mod p 4. Extract <bloom filter, IP after bloom filter, gb> 5. Authentication by IP 6. Generate session key K=(gb mod p)a mod p

  5. paper之優缺點 • 優點: • 加入影像來隱藏更加確保安全性 • 缺點: • 沒有相互驗證 • 影像容易被破壞 • 會有main-in-middle attack的問題

  6. 可能研究方向 • 加入相互驗證 • 隨機隱藏,並藏多份

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