|Original author(s)||Bram Cohen|
|Initial release||July 2, 2001|
|Operating system||Windows, macOS, Android|
|Platform||IA-32, x64, ARM|
|Available in||66 languages|
BitTorrent is an ad-supportedBitTorrent client developed by Bram Cohen and Rainberry, Inc. used for uploading and downloading files via the BitTorrent protocol. BitTorrent was the first client written for the protocol. It is often nicknamed Mainline by developers denoting its official origins. Since version 6.0 the BitTorrent client has been a rebranded version of μTorrent. As a result, it is no longer open source. It is currently available for Microsoft Windows, Mac, Linux, iOS and Android.
Programmer Bram Cohen designed the protocol in April 2001 and released a first implementation of the BitTorrent client on 2 July 2001.It is now maintained by Cohen's company BitTorrent, Inc.
Prior to version 6.0, BitTorrent was written in Python, and was free software. Very early versions released prior to December 30, 2001 were released into the public domain without a license. Versions up to and including 3.4.2 were distributed under the MIT license. The source code for versions 4.x and 5.x was released under the BitTorrent Open Source License, a modified version of the Jabber Open Source License. Versions 4.0 and 5.3 were relicensed under the GPL.
Version 4.20 of the client was dubbed Allegro by BitTorrent Inc., in reference to protocol extensions developed by the company to accelerate download performance and ISP manageability.
Version 5.30 of the client which is snapshotted at Internet Archiveis the latest open source version.
Since version 6.0, the BitTorrent client has been a rebranded version of μTorrent. It is no longer open source.
The BitTorrent client enables a user to search for and download torrent files using a built-in search box ("Search for torrents") in the main window, which opens the BitTorrent torrent search engine page with the search results in the user's default web browser.
The current client includes a range of features, including multiple parallel downloads. BitTorrent has several statistical, tabular and graphical views that allow a user to see what events are happening in the background. A host of views offer information on the peers and seeds to which the user is connected, including how much data is being downloaded from each and to how much data is being uploaded by each. It has an automatic recovery system that checks all data that has been handled after an improper shutdown. It also intermediates peering between itself, source file servers ("trackers") and other clients, thereby yielding distribution efficiencies. The client also enables users to create and share torrent files.
This article needs to be updated.(December 2013)
|Legend:||Old version, not maintained||Older version, still maintained||Current stable version||Latest preview version||Future release|
|Versions released into the public domain or under MIT License|
|Old version, no longer maintained: 1.0.0||2001 July 2|
|Old version, no longer maintained: 1.0.5||2001 July 20|
|Old version, no longer maintained: 1.0.6||2001 July 24|
|Old version, no longer maintained: 2.0.2||2001 August 10|
|Old version, no longer maintained: 2.1||2001 August 23|
|Old version, no longer maintained: 2.2||2001 September 2|
|Old version, no longer maintained: 2.3.1||2001 September 12|
|Old version, no longer maintained: 2.5||2001 October 23|
|Old version, no longer maintained: 2.6.1||2002 January 6|
|Old version, no longer maintained: 2.6.2||2002 March 18|
|Old version, no longer maintained: 2.7||2002 April 29|
|Old version, no longer maintained: 2.7.1||2002 April 30|
|Old version, no longer maintained: 2.7.2||2002 May 6|
|Old version, no longer maintained: 2.8.0||2002 May 31|
|Old version, no longer maintained: 2.8.1||2002 June 5|
|Old version, no longer maintained: 2.9||2002 July 2|
|Old version, no longer maintained: 2.9.1||2002 July 4|
|Old version, no longer maintained: 2.9.6||2002 July 18|
|Old version, no longer maintained: 3.0.1||2002 October 2|
|Old version, no longer maintained: 3.0.2||2002 November 5|
|Old version, no longer maintained: 3.1||2003 January 2|
|Old version, no longer maintained: 3.2||2003 March 28|
|Old version, no longer maintained: 3.2.1b||2003 June 5|
|Old version, no longer maintained: 3.3||2003 September 24|
|Old version, no longer maintained: 3.4||2004 March 6|
|Old version, no longer maintained: 3.4.1||2004 March 11|
|Old version, no longer maintained: 3.4.1a||2004 March 12|
|Old version, no longer maintained: 3.4.2||2004 May 15|
|Versions released under BitTorrent Open Source License|
|Old version, no longer maintained: 4.0.1||2005 April 6|
|Old version, no longer maintained: 4.1.0||2005 May 20|
|Old version, no longer maintained: 4.1.1||2005 May 25|
|Old version, no longer maintained: 4.0.4||2005 August 27|
|Old version, no longer maintained: 4.1.4||2005 August 27|
|Old version, no longer maintained: 4.1.6||2005 October 13|
|Old version, no longer maintained: 4.1.7||2005 November 3|
|Old version, no longer maintained: 4.1.8||2005 November 18|
|Old version, no longer maintained: 4.2.0||2005 November 22|
|Old version, no longer maintained: 4.2.1||2005 December 5|
|Old version, no longer maintained: 4.3.0||2005 December 5|
|Old version, no longer maintained: 4.3.2||2005 December 11|
|Old version, no longer maintained: 4.2.2||2005 December 21|
|Old version, no longer maintained: 4.3.3||2005 December 21|
|Old version, no longer maintained: 4.3.5||2006 January 9|
|Old version, no longer maintained: 4.3.6||2006 January 25|
|Old version, no longer maintained: 4.4.0||2006 February 1|
|Old version, no longer maintained: 4.9.2||2006 May 5|
|Mac OS X Version History|
|Old version, no longer maintained: 7.1.0 (22093)|
|Old version, no longer maintained: 7.1.1|
|Old version, no longer maintained: 7.2.0|
|Old version, no longer maintained: 7.2.1|
|Old version, no longer maintained: 7.2.2|
|Old version, no longer maintained: 7.3.1|
|Old version, no longer maintained: 7.3.2|
|Old version, no longer maintained: 7.3.3|
|Current stable version:7.3.5 (27628)||2012 July 25|
BitTorrent DNA (BitTorrent Delivery Network Accelerator) is a program designed to speed up the viewing of streaming video, downloading software (with or without the BitTorrent protocol) and playing online video games. It does so by distributing the end users' downloads between each other. In this way, the developers intend that content providers should take less load on their servers so the end users can receive the content faster.It runs in the background whenever the operating system is running.
BitTorrent DNA is different from traditional BitTorrent in that it relies on publisher HTTP servers in order to provide publishers with guaranteed minimum data delivery rate, as well as give publishers control over content delivery (peers must connect to the origin server before they can reach other peers), and collect information about content delivery to share with the publisher. The quality of the file transfer is specified in terms of a long-term average bitrate for data and in terms of meeting deadlines when streaming. It also can give bandwidth to TCP and other traffic.
DNA is also different from traditional BitTorrent in that it is a UDP-based protocol that has replaced regular TCP-based bandwidth throttling with a much more sensitive bandwidth management technique.
Apart from being installed by third party websites and software companies, the program for end users is also installed when the official BitTorrent client is installed (starting with the rebranded version 6.0). However, it can be independently uninstalled.
The first version of the DNA made it possible to keep the DNA application installed and yet temporarily stopped until the next system restart (through the system's control panel, in Windows XP). The DNA GUI was completely removed in the official BitTorrent version 6.1 and 6.1.1, but was re-introduced in version 6.1.2.
Since October, 2007 BitTorrent DNA has been offered by BitTorrent, Inc. as a commercial service that content providers can purchase (for an undisclosed price) and as a free background program for end users.Company President Ashwin Navin launched the product claiming that "Implementing BitTorrent DNA on top of legacy infrastructure has the profound impact of allowing our customers to deliver a better user experience, higher quality video, faster software downloads, all with the security and reliability of a managed service."
Navin in a podcast interview claimed that he attempted to sell BitTorrent DNA in January 2005. After finding that BitTorrent's brand was too polarizing for potential customers, they delayed the launch until after partnering with nearly 50 media companies in the BitTorrent Entertainment Network. That provided the company enough public validation to finally launch BitTorrent DNA two and half years later.
The service's first customer was the company Brightcove, that chose to use it to distribute streaming video files.
As of May 2009, the Asus support website is using BitTorrent DNA as an additional download method of their larger files in addition to their multiple somewhat internationally distributed HTTP servers and content delivery mirrors and other redirection facilities Asus has been known to rely in the present and past for their data delivery needs. Currently, a separate "P2P" icon is being presented for the DNA style downloads next to the "Global" and "Chinese" located servers as an example.
Peer-to-peer (P2P) computing or networking is a distributed application architecture that partitions tasks or workloads between peers. Peers are equally privileged, equipotent participants in the application. They are said to form a peer-to-peer network of nodes.
Uploading refers to transmitting data from one computer system to another through means of a network. Common methods of uploading include: uploading via web browsers, FTP clients], and terminals (SCP/SFTP). Uploading can be used in the context of clients that send files to a central server. While uploading can also be defined in the context of sending files between distributed clients, such as with a peer-to-peer (P2P) file-sharing protocol like BitTorrent, the term file sharing is more often used in this case. Moving files within a computer system, as opposed to over a network, is called file copying.
BitTorrent is a communication protocol for peer-to-peer file sharing (P2P), which enables users to distribute data and electronic files over the Internet in a decentralized manner.
Bram Cohen is an American computer programmer, best known as the author of the peer-to-peer (P2P) BitTorrent protocol, as well as the first file sharing program to use the protocol, also known as BitTorrent. He is also the co-founder of CodeCon and organizer of the San Francisco Bay Area P2P-hackers meeting, was the co-author of Codeville and creator of the Chia cryptocurrency.
BitComet is a cross-protocol BitTorrent, HTTP and FTP client written in C++ for Microsoft Windows and available in 52 different languages. Its first public release was version 0.28. The current BitComet logo has been used since version 0.50.
A BitTorrent tracker is a special type of server that assists in the communication between peers using the BitTorrent protocol.
Pando was an application which was mainly aimed at sending files which would normally be too large to send via more "conventional" means. It used both peer-to-peer and client-server architectures and was released for Windows and Mac OS X operating systems.
Protocol encryption (PE), message stream encryption (MSE) or protocol header encrypt (PHE) are related features of some peer-to-peer file-sharing clients, including BitTorrent clients. They attempt to enhance privacy and confidentiality. In addition, they attempt to make traffic harder to identify by third parties including internet service providers (ISPs). However, encryption will not protect one from DMCA notices from sharing not legal content, as one is still uploading material and the monitoring firms can merely connect to the swarm.
Peer-to-peer file sharing is the distribution and sharing of digital media using peer-to-peer (P2P) networking technology. P2P file sharing allows users to access media files such as books, music, movies, and games using a P2P software program that searches for other connected computers on a P2P network to locate the desired content. The nodes (peers) of such networks are end-user computers and distribution servers.
qBittorrent is a cross-platform free and open-source BitTorrent client.
Rainberry, Inc., formerly known as BitTorrent, Inc., is an American company that is responsible for the ongoing development of the BitTorrent peer-to-peer protocol, as well as the ongoing development of μTorrent and BitTorrent Mainline, two clients for that protocol. Files transferred using the BitTorrent protocol constitute a significant slice of all Internet traffic. At its peak, 170 million people used the protocol every month, according to the company's website. The company was founded on September 22, 2004 by Bram Cohen and Ashwin Navin. In 2018, the company was acquired by cryptocurrency startup TRON, and Bram Cohen left the company.
Tribler is an open source decentralized BitTorrent client which allows anonymous peer-to-peer by default. Tribler is based on the BitTorrent protocol and uses an overlay network for content searching. Due to this overlay network, Tribler does not require an external website or indexing service to discover content. The user interface of Tribler is very basic and focused on ease of use instead of diversity of features. Tribler is available for Linux, Windows, and OS X.
The following is a general comparison of BitTorrent clients, which are computer programs designed for peer-to-peer file sharing using the BitTorrent protocol.
This is a glossary of jargon related to peer-to-peer file sharing via the BitTorrent protocol.
libtorrent is an open-source implementation of the BitTorrent protocol. It is written in and has its main library interface in C++. Its most notable features are support for Mainline DHT, IPv6, HTTP seeds and μTorrent's peer exchange. libtorrent uses Boost, specifically Boost.Asio to gain its platform independence. It is known to build on Windows and most Unix-like operating systems.
Micro Transport Protocol or μTP is an open UDP-based variant of the BitTorrent peer-to-peer file sharing protocol intended to mitigate poor latency and other congestion control problems found in conventional BitTorrent over TCP, while providing reliable, ordered delivery.
In the BitTorrent file distribution system, a torrent file or meta-info file is a computer file that contains metadata about files and folders to be distributed, and usually also a list of the network locations of trackers, which are computers that help participants in the system find each other and form efficient distribution groups called swarms. A torrent file does not contain the content to be distributed; it only contains information about those files, such as their names, folder structure, and sizes obtained via cryptographic hash values for verifying file integrity. The term torrent may refer either to the metadata file or to the files downloaded, depending on the context.
Torrent poisoning is intentionally sharing corrupt data or data with misleading file names using the BitTorrent protocol. This practice of uploading fake torrents is sometimes carried out by anti-infringement organisations as an attempt to prevent the peer-to-peer (P2P) sharing of copyrighted content, and to gather the IP addresses of downloaders.
μTorrent, or uTorrent is a proprietary adware BitTorrent client owned and developed by Rainberry, Inc. With over 150 million users it is the most widely used BitTorrent client outside China; globally only behind Xunlei. The "μ" in its name comes from the SI prefix "micro-", referring to the program's small memory footprint: the program was designed to use minimal computer resources while offering functionality comparable to larger BitTorrent clients such as Vuze or BitComet. μTorrent became controversial in 2015 when many users unknowingly accepted a default option during installation which also installed a cryptocurrency miner. The miner was removed in later versions, but had already done irreversible damage to μTorrent's reputation.
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