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Adding Confidentiality to Pull-based Peer-to-Peer Live Streaming

Adding Confidentiality to Pull-based Peer-to-Peer Live Streaming. Authors: Jian-Guang Luo, Jiang Zhang, and Shi-Qiang Yang Source: 5th IEEE Consumer Communications and Networking Conference, pp. 500-504, 2008 Speaker: Shu-Fen Chiou( 邱淑芬 ). Motivation.

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Adding Confidentiality to Pull-based Peer-to-Peer Live Streaming

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  1. Adding Confidentiality to Pull-based Peer-to-PeerLive Streaming Authors: Jian-Guang Luo, Jiang Zhang, and Shi-Qiang Yang Source: 5th IEEE Consumer Communications and Networking Conference, pp. 500-504, 2008 Speaker: Shu-Fen Chiou(邱淑芬)

  2. Motivation • P2P影音串流(P2P live streaming)目前是一種很盛行的服務(PPStream, PPLive)，因此延伸出一些安全性的問題。 • 本篇論文就是要將confidentiality加入以維護安全。

  3. Requirements • Hybrid P2P • Key management • Confidentiality • Reliability • Scalability

  4. P2P Environment Group key: GK GC U P2 new client P1 P3 P5 P4 P6

  5. Notataions

  6. Member Join Members in group U GC JOIN request Authentication U Generate IDU EKU-GC(IDU||ESKGC(IDU||PKU)), member_info Generate join flag JF Generate New GKi+1 EKU-GC(SN_change_block||GKi+1 ||SGC(GKi+1)) JF||IDU||ESKGC(IDU||PKU)||PKU <SN_change_block, EGKi(GKi+1||SGC(GKi+1)> • SN_change_block: a sequential number

  7. Member Leave Partner V U GC Generate leaving flag LF LF||IDU||ESKGC(IDU||PKU)||PKU QUIT request Generate New GKi+1 <SN_change_block, EKGC-V(GKi+1||SGC(GKi+1)> Decrypt and get GKi+1

  8. Batch scheme

  9. 優缺點 • 優點: • Key的產生方式簡單,計算複雜度低 • 達到基本的安全 • 缺點: • 每當有一個user要加入或離開時,GC就必須重新計算key,並分布給其他的member.

  10. 可能研究方向 • 本篇的方法已有前提假設user已註冊,因要加入時GC可以認證.因此未來在考量時應從註冊的步驟開始設計. • 利用hash-chain的觀念,並要達到forward 和backward secrecy. • 加入DRM的模式.

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