API popularity gives a picture of changing popularity for a torrent in the BitTorrent DHT network. BTDigg was founded by Nina Evseenko in January 2011. The site is also available via the I2P network and Tor. BTDigg provides decentralization of database creation and ability to show distributed ratings being provided by users via μTorrent. There is also no guarantee about content because BTDigg does not analyze and does not store content. BTDigg is not a tracker because it does not share content, does not participate in or coordinate BitTorrent swarm. It is not a BitTorrent Index because it does not store and does not maintain a static list of torrents.

The Pirate Bay

Pirate Bayphysibleretaliatory
In August 2016, the US government shut down KickassTorrents, which resulted in The Pirate Bay becoming once again the most visited BitTorrent website. The Pirate Bay allows users to search for Magnet links. These are used to reference resources available for download via peer-to-peer networks which, when opened in a BitTorrent client, begin downloading the desired content. (Originally, The Pirate Bay allowed users to download BitTorrent files (torrents), small files that contain metadata necessary to download the data files from other users). The torrents are organised into categories: "Audio", "Video", "Applications", "Games", "Porn" and "Other".


Gary Fung
It originated in 2003 as website for IRC files search and reached over 13.7 million torrents in its database and 20 million peers from indexed torrents. With 7.4 million unique visitors, isoHunt was one of the most popular BitTorrent search engines. Thousands of torrents were added to and deleted from it every day. Users of isoHunt performed over 40 million unique searches per month. On October 19, 2008, isoHunt passed the 1 petabyte mark for torrents indexed globally. The site was the third most popular BitTorrent site. According to isoHunt, the total amount of shared content was more than 14.11 petabytes.

Torrentz was a Finland-based metasearch engine for BitTorrent, run by an individual known as Flippy. Founded in July 24, 2003. It indexed torrents from various major torrent websites, and offered compilations of various trackers per torrent that were not necessarily present in the default .torrent file, so that when a tracker was down, other trackers could do the work. It was the second most popular torrent website in 2012. Torrentz's user interface was simple; it had only a user menu and a search panel. Users were not required to register before searching files.

Metasearch engine

metasearchmetasearch enginesmeta search engine
A metasearch engine (or search aggregator) is an online Information retrieval tool that uses the data of a web search engine to produce its own results. Metasearch engines take input from a user and immediately query search engines for results. Sufficient data is gathered, ranked, and presented to the users.

Mininova was a website offering BitTorrent downloads. Mininova was once one of the largest sites offering torrents of copyrighted material, but in November 2009, following legal action in the Dutch courts, the site operators deleted all torrent files uploaded by regular users including torrents that enabled users to download copyrighted material. On April 4, 2017 Mininova shut down, saying that it had been running at a loss "for some years". The site was based in the Netherlands and was launched in January 2005 as a successor to, which went offline at the end of 2004 following legal difficulties. In April 2007, Mininova B.V.


Whether the MPAA will collect the $110 million from TorrentSpy remains to be seen. * BitTorrent. Peer-to-peer file sharing. isoHunt. Torrent Search Engine. Bitcomet.


BTJunkie was a BitTorrent web search engine operating between 2005 and 2012. It used a web crawler to search for torrent files from other torrent sites and store them on its database. It had nearly 4,000,000 active torrents and about 4,200 torrents added daily (compared to runner-up Torrent Portal with 1,500), making it the largest torrent site indexer on the web in 2006. During 2011, BTJunkie was the 5th most popular BitTorrent site. BTJunkie indexed both private and public trackers using an automatic web crawler that scanned the Internet for torrent files. Cookies were used to track what a visitor downloaded so that there was no need to register in order to rate torrents.

Web search engine

search enginesearch enginesweb search
. • Comparison of web search engines • Information retrieval • List of search engines • Question answering • Filter bubble • Google effect • Use of web search engines in libraries • Semantic Web • Spell checker • Web development tools • Search engine manipulation effect • Search engine privacy * * 1) Web crawling. 2) Indexing. 3) Searching. Bing Liu (2007), Web Data Mining: Exploring Hyperlinks, Contents and Usage Data. Springer,ISBN: 3-540-37881-2. Bar-Ilan, J. (2004). The use of Web search engines in information science research. ARIST, 38, 231-288. ISBN: 978-0-910965-76-7. ISBN: 978-0-910965-76-7. ISBN: 978-0-910965-76-7.


Facebook LiveFacebook.comFacebook, Inc.
According to an interview in 2012 with Chuck Rossi, a build engineer at Facebook, Facebook compiles into a 1.5 GB binary blob which is then distributed to the servers using a custom BitTorrent-based release system. Rossi stated that it takes about 15 minutes to build and 15 minutes to release to the servers. The build and release process has zero downtime. Changes to Facebook are rolled out daily. Facebook used a combination platform based on HBase to store data across distributed machines. Using a tailing architecture, events are stored in log files, and the logs are tailed. The system rolls these events up and writes them to storage.

List of Tor onion services

BabylonC'thulhu (assassination)Hell
The Pirate Bay, a BitTorrent tracker. Freedom Hosting (defunct) – Formerly the largest Tor-specific web host, until the arrest of its owner in August 2013. KickassTorrents, a BitTorrent tracker (defunct)., a popular bitcoin blockchain explorer service. Bitcoin Fog, a cryptocurrency tumbler. Helix (defunct). National Police and Public Prosecution Service of the Netherlands — official hidden service about darknet market takedown operations. Central Intelligence Agency. The Hidden Wiki. BBC News. BuggedPlanet. The New York Times. Deutsche Welle. Wikipedia (accessible only via telnet) (defunct). DeepDotWeb (defunct). Doxbin (defunct).

Solaris (operating system)

SolarisSolaris 10Sun Solaris
In 2011, the Solaris 11 kernel source code leaked to BitTorrent. However, through the Oracle Technology Network (OTN), industry partners can still gain access to the in-development Solaris source code. Solaris is developed under a proprietary development model and only the source for open source components of Solaris 11 are available for download from Oracle. In 1987, AT&T Corporation and Sun announced that they were collaborating on a project to merge the most popular Unix variants on the market at that time: Berkeley Software Distribution, UNIX System V, and Xenix. This became Unix System V Release 4 (SVR4).

Windows Vista

VistaMicrosoft Windows VistaWindows Vista Service Pack 1
Occasional builds of Longhorn were leaked onto popular file sharing networks such as IRC, BitTorrent, eDonkey and various newsgroups, and so most of what is known about builds prior to the first sanctioned development release of Longhorn in May 2003, is derived from these builds. After several months of relatively little news or activity from Microsoft with Longhorn, Microsoft released Build 4008, which had made an appearance on the Internet around February 28, 2003. It was also privately handed out to a select group of software developers.


;Blog search engines: Several blog search engines have been used to search blog contents, such as Bloglines, BlogScope, and Technorati. Technorati was one of the more popular blog search engines, but the website stopped indexing blogs and assigning authority scores in May 2014. The research community is working on going beyond simple keyword search, by inventing new ways to navigate through huge amounts of information present in the blogosphere, as demonstrated by projects like BlogScope, which was shut down in 2012. ;Blogging communities and directories: Several online communities exist that connect people to blogs and bloggers to other bloggers.

Mac OS X Tiger

Mac OS X v10.4Mac OS X 10.4Mac OS X 10.4 Tiger
Four months before that official release, several non-commercial, developer's releases of Mac OS X 10.4 Tiger leaked onto the internet via BitTorrent file sharers. It was first mentioned on Apple's website on May 4, 2004. Apple sued these file sharers. On April 12, 2005, Apple announced Mac OS X 10.4 Tiger's official, worldwide release would be April 29. All Apple Stores around the world held Mac OS X 10.4 Tiger seminars, presentations and demos.

Desktop search

search systemDesktop search enginefile indexing and search
*List of desktop search engines file and folder names. metadata, such as titles, authors, comments in file types such as MP3, PDF and JPEG. file content, for the types of documents supported by the tool.

Peer-to-peer file sharing

P2Ppeer-to-peer filesharingP2P file sharing
Torrent poisoning. Trade group efforts against file sharing. Warez.

Comparison of BitTorrent clients

BitTorrent clienttorrent clientComparison of BitTorrent software
The following is a general comparison of BitTorrent clients, which are computer programs designed for peer-to-peer file sharing using the BitTorrent protocol. The BitTorrent protocol coordinates segmented file transfer among peers connected in a swarm. A BitTorrent client enables a user to exchange data as a peer in one or more swarms. Because BitTorrent is a peer-to-peer communications protocol that does not need a server, the BitTorrent definition of client differs from the conventional meaning expressed in the client–server model. Bram Cohen, author of the BitTorrent protocol, made the first BitTorrent client, which he also called BitTorrent, and published it in July 2001.


AzureusAzureus (now Vuze)Azureus (software)
Due to the high bandwidth usage caused by the BitTorrent protocol, it is considered impolite and inappropriate by Tor community members to use the Tor network for BitTorrent transfers. By default, the Tor exit policy blocks the standard BitTorrent ports. It also includes I2P support via an official plugin. In contrast to Tor, I2P is built for P2P traffic and encourages its use. * Comparison of BitTorrent clients. Spigot Inc.

Bram Cohen

Cohen has received a number of awards for his work on the BitTorrent protocol. These awards include: * Interview with Bram Cohen on NPR 2004 Wired Rave Award. 2005 MIT Technology Review TR35 as one of the top 35 innovators in the world under the age of 35. 2005 Time's 100 Most Influential People. 2006 USENIX STUG Award. 2010 Internet Evolution 100. Interview with Cohen about BitTorrent and CodeCon. Interview with Bram Cohen about legal issues and The Pirate Bay. Interview with Bram Cohen on NPR.

Internet traffic

trafficDaily traffic (as of October, 2019)IP traffic
The prevalent technology for file sharing is the BitTorrent protocol, which is a peer-to-peer (P2P) system mediated through indexing sites that provide resource directories. The traffic patterns of P2P systems are often described as problematic and causing congestion. According to a Sandvine Research in 2013, Bit Torrent’s share of Internet traffic decreased by 20% to 7.4% overall, reduced from 31% in 2008. The Internet does not employ any formally centralized facilities for traffic management.

BitTorrent tracker

trackertorrent trackertrackers
BitTorrent (protocol). BitTorrent client. Comparison of BitTorrent tracker software. Comparison of BitTorrent sites. Bram Cohen. Distributed hash table. UDP tracker. XBT Tracker – C++ BitTorrent tracker designed for performance (does not serve .torrent files or other web pages); requires MySQL.

Torrent file

This key's value is a list of web addresses where torrent data can be retrieved: BEP-0027 extends BitTorrent to support private torrents. A new key, private, is placed in the info dictionary. This key's value is 1 if the torrent is private: BEP-0030 extends BitTorrent to support Merkle trees. The purpose is to reduce the file size of torrent files, which reduces the burden on those that serve torrent files. A torrent file using Merkle trees does not have a pieces key in the info list. Instead, such a torrent file has a root_hash key in the info list.


The first version of Tribler was an enhancement of Yet Another BitTorrent Client. In 2009, the development team behind Tribler stated that their efforts for the coming years were focused on the integration of Tribler with television hardware. In 2014, with the release of version 6.3.1, a custom built-in onion routing network was introduced as part of Tribler. This feature is only for file transfers between Tribler users, not to any clearnet torrent nor to any clearnet BitTorrent client. Because the custom onion network does not use Tor exit nodes, it is enhanced to make every Tribler user to function as a relay.

Segmented file transfer

segmented downloadingswarmingDistributed downloading protocols
CCSDS software uploading protocols have the capability of segmented uploading, but current deployed systems have not been in need of the protocol being used in its most BitTorrent like capability. Satellite direct to home subscription systems deployed in Europe and North America have employed an approach of upgrading software on customer devices by only sending a few bytes at a time (~2k or less) over a long period of time. Generally these segmented upload approaches are proprietary and related to the SIM card security and subscription mechanism. BitTorrent. Direct Connect (file sharing). Download Manager. eMule. iMule. Swarmcast. KaZaA. RetroShare. RevConnect. Metalink. Peercasting.