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File Pollution: Infocom 05
File Pollution: Infocom 05
File Pollution
File Pollution
File Pollution
File Pollution
Having Fun with P2P
Having Fun with P2P
Having Fun with P2P
Having Fun with P2P
Having Fun with P2P
Having Fun with P2P
FastTrack Copies
FastTrack Copies
Overnet Copies
Overnet Copies
Simple analysis of fake block attack
Simple analysis of fake block attack
Probability of a clean piece
Probability of a clean piece
Azureus results
Azureus results
Zoom in one Azureus trace
Zoom in one Azureus trace
Handshake messages sent by chatty peers
Handshake messages sent by chatty peers
uTorrent
uTorrent
Zoom in on uTorrent trace
Zoom in on uTorrent trace
Seed attack results
Seed attack results
Seed attack results
Seed attack results
Live Streaming: Faculty Collaborators
Live Streaming: Faculty Collaborators
Live Streaming: Faculty Collaborators
Live Streaming: Faculty Collaborators
Live Streaming: Faculty Collaborators
Live Streaming: Faculty Collaborators
Having Fun with P2P
Having Fun with P2P
PPLive: Chinese New Year 2006
PPLive: Chinese New Year 2006
Картинки из презентации «Having Fun with P2P» к уроку английского языка на тему «Без темы»

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Having Fun with P2P

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1Having Fun with P2P. Keith W. Ross 24attack nodes (m < n) k = # neighbors
Polytechnic University from which it is downloading the 16
http://cis.poly.edu/~ross. blocks.
2Many Apps Migrating Client-Server to 25Probability of a clean piece. 70%
P2P. File sharing File and patch failure requires 20% attack neighbors ?
distribution Live video streaming Video on increases for rare pieces and in end game.
demand VoIP Hybrid CDN/P2P. 26Connection attack. Attacker
3Today’s Talk. P2P security Is establishes many TCP connections to each
BitTorrent Unstoppable? Survey of P2P target peer. Doesn’t upload any blocks
video streaming research Creating an open Chatty peer: keeps connection active with
P2P video streaming ecosystem. Research repeated BT handshake messages.
supported by: NSF, Microsoft, Movie Labs, 27Passive Measurements. Collect traces
Huawei, Verizon, Panasonic, Len Shustek. while downloading Azureus and uTorrent DSL
4Why study P2P Security? P2P is and Ethernet 54 downloads of “Foo
potentially more vulnerable than client Fighters” (108 MB) Developed parser to
server. Need to understand the security analyze BT trace To estimate download time
issues for architecting future P2P apps without attack: Obtain blacklist from
Attacks from entertainment industry reveal torrentfreak.com Use Peer Guardian to
weak spots in P2P. prevent connections to blacklisted peers.
5Security work joint with: Jian Liang. 28Azureus results. Download is NOT being
Naoum Naoumov. Rakesh Kumar. Prithula prolonged by more than 50% for DSL.
Dhungel. Xiaojun Hei. Di Wu. 29Zoom in one Azureus trace.
6Earlier work on Kazaa and eDonkey. Chatty-peers make up a major fraction of
FastTrack/Kazaa Unstructured P2P network the useful peers.
Overnet/Kad Structured (DHT) P2P network 30Handshake messages sent by chatty
Part of eDonkey/eMule. peers.
7File Pollution: Infocom 05. original 31uTorrent.
content. polluted content. pollution 32Zoom in on uTorrent trace.
company. 33Passive Measurement Conclusions.
8File Pollution. pollution server. Anti-P2P companies applying different
pollution company. file sharing network. strategies for different BT clients
pollution server. pollution server. Largely ineffective for Ethernet clients
pollution server. For DSL, download time increases by
9File Pollution. Unsuspecting users 30-60%.
spread pollution ! 34Active Measurements. Crawl peers in
10File Pollution. Unsuspecting users torrent and identify Fake-block attack
spread pollution ! Yuck. peers Chatty peers Looked at 8 box-office
11Index Poisoning: Infocom 06. file movie torrents Some under attack; some not
sharing network. index title location Crawler speaks Azureus protocol to Azureus
bigparty 123.12.7.98 smallfun 23.123.78.6 peers and conventional protocol to all
heyhey 234.8.89.20. 23.123.78.6. other peers.
123.12.7.98. 234.8.89.20. 35Active Measurement Conclusions.
12Index Poisoning. index title location Several, but not all, top-box movies are
bigparty 123.12.7.98 smallfun 23.123.78.6 under attack Published blacklists do not
heyhey 234.8.89.20. index title location cover all the attackers in a torrent Most
bigparty 123.12.7.98 smallfun 23.123.78.6 attackers enter through gossiping.
heyhey 234.8.89.20 bighit 111.22.22.22. 36Seed Attack. “Nip in the bud” Make
23.123.78.6. 123.12.7.98. 234.8.89.20. many connections to seed, download at high
111.22.22.22. rate Rationale: Conventional algo gives
13 all its bandwidth to 5 highest
14 downloaders.
15 37Planet Lab experiments. Put 30
16FastTrack Copies. leechers on PL nodes; upload capacity
17Overnet Copies. capped at 512 kbps Seed upload capacity
18Is BitTorrent Unstoppable? (IPTPS 160 kbps Azureus and uTorrent 0-60 attack
2008; extended version available) How can peers Start seed, start 5 leechers, start
record/movie companies limit piracy in attack peers, start 25 leechers.
BitTorrent? Suing companies? Suing users? 38Seed attack results. delay. attacker
Internet attacks? How vulnerable is bandwidth.
BitTorrent to attacks? 39BitTorrent Conclusions. Attacks
19BitTorrent. torrent: group of peers against leechers can prolong downloads But
exchanging chunks of a file. tracker: is 50% enough? Blacklists are helpful;
tracks peers in torrent; provides tracker adaptive blacklist is needed Seed is
list. torrent index server: search for surprisingly resilient to attacks Attacks
torrents; provides .torrent file. trading must be tailored to client types
chunks. peer. BitTorrent ecosystem is difficult to stop!
20BitTorrent Ecosystem. Open protocol 40Today’s Talk. P2P security Is
50+ client implementations Dozens of BitTorrent Unstoppable? Survey of P2P
tracker implementations Dozens of torrent video streaming research Creating an open
location sites 5 million simultaneous P2P video streaming ecosystem. Research
users & growing Evolving: Peer supported by: NSF, Microsoft, Movie Labs,
discovery: DHTs, gossiping Proprietary Huawei, Verizon, Panasonic, Len Shustek.
protocols, private torrents. 41Live Streaming: Faculty Collaborators.
21BitTorrent Basics. Seeds and leechers Professor Yong Liu. Professor Shiv Panwar.
File divided into 256KB pieces. Each piece Professor Yao Wang. and Professor Nitsesh
is 16 blocks. Download blocks and assemble Saxena (CS). . . .
pieces Hash piece to check integrity Peers 42Basic idea P2P live streaming. Source
advertise pieces they have to neighbors of video. tracker. trade chunks.
Peer sends blocks to four neighbors 43
currently sending it data at the highest 44PPLive: Chinese New Year 2006.
rate And also to one random neighbor. 45@ Polytechnic. Infrastructure for
22Classes of BitTorrent Attacks. Attacks measuring P2P live video systems Xiaojun
against an existing torrent against Hei, Jian Liang, Yong Liu Stochastic
leechers against initial seed against peer modeling of P2P live streaming Rakesh
discovery against peer discover Decoy Kumar, Yong Liu Incentives and scalable
attacks: attacker creates own torrent video for live P2P streaming Zhengye Liu,
Seeding a polluted file Seeding a file and Yanming Shen, Shiv Panwar, Yao Wang
delivering only 99%. Security of P2P live streaming systems
23Fake Block Attack. Attacker Prithula Dhungel, Xiaojun Hei, Nitesh
establishes TCP connections with Saxena P2P VoD, Hybrid P2P-CDN Angela
legitimate peers Peer downloads one fake Wang, MSR colleagues Developing our own
block from attacker and 15 good blocks live P2P video system Master’s students.
from legit peers Hash failure – download 46Open P2P Live Streaming. Create an
is prolonged. Acknowledgment: Thanks to ecosystem for live streaming Need
Vishal Misra for bringing this attack to incentives The more you upload the better
our attention. the quality Layered video Chunk-based
24Simple analysis of fake block attack. Substream-based Accommodate user generated
What is the probability of a hash failure? content.
n = # neighbors advertising piece m = 47Thank You !
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Having Fun with P2P

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