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Peer-to-Peer Networks 16 P2P in the Wild Christian Schindelhauer Technical Faculty Computer-Networks and Telematics University of Freiburg Real-World P2P Applications in 2016 File sharing & transmission Bittorrent, eMule,

  1. Peer-to-Peer Networks 16 P2P in the Wild Christian Schindelhauer Technical Faculty Computer-Networks and Telematics University of Freiburg

  2. Real-World P2P Applications in 2016 � File sharing & transmission � Bittorrent, eMule, FastTrack, DirectConnect, Gnutella, Skype, Maidsafe � Chat � Skype, Tonic, OMessenger, PoPNote, LAN Messenger, WireNote, Mossawir LAN Messenger, Squiggle, CDMessenger, Softros LAN Messenger, … � VoIP, Video-Chat � Skype, Zello, Brosix, Google Hangout � Synchronization & backup � Bittorrent Sync, SyncThing � Money � Bitcoin, Maissafe � Software distribution & update � Windows 10 updates, Steam � Anonymize � I2P, Freenet, TorChat, Tribler, Bitmessage, DigitalNote XDN, Osiris, Syndle, Perfect Dark, Netsukuku, DigitalNote XDN, Tahoe-LAFS � Media Streaming � Vuze, Tribler, Miro Media Player, PPLive � Programming platforms, Frameworks � JXTA, GNUNet, Windows Peer Networking � Web search � Yacy, Faroo 2

  3. Synchronization & Backup � Problem � Synchronize two file systems � Differential backups � Standard solutions � rsync � network protocol and tool � transmits only the differences of files � for upholding copies of file systems � no versioning � Cloud services � e.g. Google drive, Dropbox, BWsync&share, etc � synchronizes directories to server � only differential update � versioning 3

  4. Peer-to-Peer File Synchronization � Idea � rsync but for many peers � Bittorrent Sync � uses Bittorrent for updates � closed group of servers � symmetric cryptography AES-128 � versioning � no conflict handling � SyncThing � open source � secure, authenticated, TLS � versioning � no conflict handling 4

  6. BitCoin � Peer-to-Peer Money transactions - open source digital currency - decentralized currency - Public-key cryptography - Digital signatures - Anonymity if TOR is used � Peer-to-Peer network for transactions - Distributed computation tasks determine the order of transactions 6

  7. Chat Tools � Lots of commercial/open software - Skype, Tonic, OMessenger, PoPNote, LAN Messenger, WireNote, Mossawir LAN Messenger, Squiggle, CDMessenger, Softros LAN Messenger, … � Motivation - Harness the power of the Internet for direct communication � Features - often group features - secure communication - cheap server less solutions 7

  9. File Sharing � Bittorrent - dominates traffic - with DHT or tracker hosts - extra infrastructure for search � eMule, FastTrack, DirectConnect, Gnutella - less traffic since 2003 - security issues � Other P2P tools like Skype - offer also file transmission 9

  10. Media Streaming � A lot of former P2P Streaming � Peercast, peerstreamer, QQLive, Joost, Zattoo, Moved to Client-Server � Octoshape, Zattoo � Survivers: � Bittorrent-related: Vuze, Bittorrent � streamer (p2p radio) � Miro Media Player (malware financed) � Big in China � PPStream, PPTV, Funshion 10

  12. I2P � I2P (Invisible Internet Project) � darknet � anonymous peer-to-peer distribution communication layer � Garlic routing � combining small onions in one message � allows any traditional internet application � email, IRC, file sharing, web hosting, HTTP � File sharing � Bittorrent, iMule, I2Phex � Email � I2P-Bote � Instant Messaging � I2P-Messenger, I2P-Talk 12

  13. Peer-to-Peer Networks 16 P2P in the Wild Christian Schindelhauer Technical Faculty Computer-Networks and Telematics University of Freiburg

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