Part of a series onFile sharing Technologies

  • File hosting services
  • Online video platform
  • Peer to peer
  • Usenet
  • Web hosting
  • WebRTC
  • XDCC

Video sharing sites

  • 123Movies
  • Dailymotion
  • PeerTube
  • Putlocker
  • YouTube

BitTorrent sites

  • 1337x
  • Demonoid
  • ExtraTorrent
  • EZTV
  • isoHunt
  • KickassTorrents
  • Nyaa Torrents
  • Tamil Rockers
  • The Pirate Bay
  • YIFY
  • FitGirl Repacks


  • #ICanHazPDF
  • Internet Archive
  • Library Genesis
  • Sci-Hub
  • Academic Torrents
  • Z-Library

File sharing networks

  • BitTorrent
  • Direct Connect
  • eDonkey
  • Freenet
  • Gnutella
  • Gnutella2
  • IPFS
  • LBRY
  • List of P2P protocols
  • WebTorrent

P2P clients

  • BitComet
  • DC++
  • Deluge
  • eMule
  • μTorrent
  • qBittorrent
  • Shareaza
  • Soulseek
  • Transmission
  • Tribler
  • Vuze
  • WinMX
  • Napster

Streaming programs

  • Butter Project
  • Popcorn Time
  • Torrents-Time

Anonymous file sharing

  • Anonymous P2P
  • Darknet
  • Freenet
  • Friend-to-friend
  • I2P
  • Private P2P
  • Proxy server
  • Seedbox
  • Tor
  • VPN

Development and societal aspects

  • Timeline
  • Legality
  • BitTorrent issues

By country or region

  • Canada
  • Japan
  • Singapore
  • UK
  • US


  • Comparison of BitTorrent clients
  • Comparison of BitTorrent sites
  • Comparison of eDonkey software
  • Comparison of Internet Relay Chat clients
  • Comparison of Usenet newsreaders

A friend-to-friend (or F2F) computer network is a type of peer-to-peer network in which users only make direct connections with people they know. Passwords or digital signatures can be used for authentication.

Unlike other kinds of private P2P, users in a friend-to-friend network cannot find out who else is participating beyond their own circle of friends, so F2F networks can grow in size without compromising their users’ anonymity. Retroshare, WASTE, GNUnet, Freenet and OneSwarm are examples of software that can be used to build F2F networks, though RetroShare is the only one of these configured for friend-to-friend operation by default.

Many F2F networks support indirect anonymous or pseudonymous communication between users who do not know or trust one another. For example, a node in a friend-to-friend overlay can automatically forward a file (or a request for a file) anonymously between two friends, without telling either of them the other’s name or IP address. These friends can in turn automatically forward the same file (or request) to their own friends, and so on.

Xem thêm thông tin hay:  Các định dạng tệp được hỗ trợ trong PowerPoint

Dan Bricklin coined the term “friend-to-friend network” in 2000.[1]

Potential applications of F2F[edit]

  • The Bouillon project uses a friend-to-friend network to assign trust ratings to messages.[2]
  • The Ripple monetary system is a friend-to-friend network system for electronic money.

See also[edit]

  • Darknet
  • LAN messenger
  • Private P2P
  • Web of trust


  • B.C. Popescu, B. Crispo, and A.S. Tanenbaum. “Safe and Private Data Sharing with Turtle: Friends Team-Up and Beat the System.” In 12th International Workshop on Security Protocols, Cambridge, UK, April 2004.
  • T. Chothia and K. Chatzikokolakis. “A Survey of Anonymous Peer-to-Peer File-Sharing.” In Proceedings of the IFIP International Symposium on Network-Centric Ubiquitous Systems (NCUS 2005), Nagasaki, Japan, volume 3823 of Lecture Notes in Computer Science, pages 744-755. Springer, 2005.
  • J. Li and F. Dabek. “F2F: Reliable Storage in Open Networks.” In 5th International Workshop on Peer-to-Peer Systems (IPTPS ’06), Santa Barbara, CA, USA, February 2006.
  • M. Rogers and S. Bhatti. “How to Disappear Completely: A Survey of Private Peer-to-Peer Networks.” In 1st International Workshop on Sustaining Privacy in Collaborative Environments (SPACE 2007), Moncton, NB, Canada, July 2007.
  • Numbered references:

External links[edit]

Look up friend-to-friend in Wiktionary, the free dictionary.

  •, An XML scripting language for writing F2F software
  • Discussion about F2F involving Ian Clarke of Freenet
  • F2F page at
  • Ripple: P2P money for trusted social networks
  • Bouillon project website at the Wayback Machine (archived July 16, 2010)
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