.BitTorrent (abbreviated to BT) is a communication for (P2P) which is used to distribute and over the.BitTorrent is one of the most common protocols for transferring large files, such as files containing or or files containing. Peer-to-peer networks have been estimated to collectively account for approximately 43% to 70% of all (depending on location) as of February 2009. In February 2013, BitTorrent was responsible for 3.35% of all worldwide, more than half of the 6% of total bandwidth dedicated to file sharing.To send or receive files, a person uses a on their -connected. A BitTorrent client is a computer program that implements the BitTorrent protocol.

Popular clients include, Thunder,. Provide a list of files available for transfer, and allow the client to find peer users known as seeds who may transfer the files.Programmer, a former student, designed the protocol in April 2001 and released the first available version on 2 July 2001, and the most recent version in 2013.

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Are available for a variety of and including an official client released byAs of 2013, BitTorrent has 15–27 million concurrent users at any time.As of January 2012, BitTorrent is utilized by 150 million active users. Based on this figure, the total number of monthly BitTorrent users may be estimated to more than a quarter of a billion. Torrenting may sometimes be limited by on legal or copyright grounds, so users in response may use. The middle computer is acting as a 'seed' to provide a file to the other computers which act as peers.The BitTorrent protocol can be used to reduce the server and network impact of distributing large files. Rather than downloading a file from a single source server, the BitTorrent protocol allows users to join a 'swarm' of hosts to upload to/download from each other simultaneously. The protocol is an alternative to the older single source, multiple mirror sources technique for distributing data, and can work effectively over networks with lower.

Using the BitTorrent protocol, several basic computers, such as home computers, can replace large servers while efficiently distributing files to many recipients. This lower bandwidth usage also helps prevent large spikes in in a given area, keeping internet speeds higher for all users in general, regardless of whether or not they use the BitTorrent protocol.The first release of the Bittorrent client had no search engine and no peer exchange, so users who wanted to upload a file had to create a small torrent descriptor file that they would upload to a torrent index site. The first uploader acted as a, and downloaders would initially connect as (see diagram on the right). Those who wish to download the file would download the torrent which their client would use to connect to tracker which had a list of the IP addresses of other seeds and peers in the swarm. Once a peer completed a download of the complete file, it could in turn function as a seed.The file being distributed is divided into called pieces.

As each peer receives a new piece of the file, it becomes a source (of that piece) for other peers, relieving the original seed from having to send that piece to every computer or user wishing a copy. With BitTorrent, the task of distributing the file is shared by those who want it; it is entirely possible for the seed to send only a single copy of the file itself, and eventually distribute to an unlimited number of peers. Each piece is protected by a contained in the torrent descriptor. This ensures that any modification of the piece can be reliably detected, and thus prevents both accidental and malicious modifications of any of the pieces received at other nodes. If a node starts with an authentic copy of the torrent descriptor, it can verify the authenticity of the entire file it receives.Pieces are typically downloaded non-sequentially, and are rearranged into the correct order by the BitTorrent client, which monitors which pieces it needs, and which pieces it has and can upload to other peers. Pieces are of the same size throughout a single download (for example a 10 MB file may be transmitted as ten 1 MB pieces or as forty 256 KB pieces).Due to the nature of this approach, the download of any file can be halted at any time and be resumed at a later date, without the loss of previously downloaded information, which in turn makes BitTorrent particularly useful in the transfer of larger files. This also enables the client to seek out readily available pieces and download them immediately, rather than halting the download and waiting for the next (and possibly unavailable) piece in line, which typically reduces the overall time of the download.

This eventual transition from peers to seeders determines the overall 'health' of the file (as determined by the number of times a file is available in its complete form).The distributed nature of BitTorrent can lead to a spreading of a file throughout many peer computer nodes. As more peers join the swarm, the likelihood of a successful download by any particular node increases. Relative to traditional Internet distribution schemes, this permits a significant reduction in the original distributor's hardware and bandwidth resource costs. In general provide against system problems, reduce dependence on the original distributor, and provide sources for the file which are generally and therefore there is no single point of failure as in one way server-client transfers.Operation A bittorrent client is capable of preparing, requesting, and transmitting any type of over a network, using the protocol. Up until 2005, the only way to share files was by creating a small text file called a '. These files contain about the files to be shared and the which keep track of the other seeds and peers. Users that want to download the file first obtain a torrent file for it, and connect to the tracker or seeds.

In 2005, first and then the Bittorrent client introduced distributed tracking using distributed hash tables which allowed clients to exchange data on swarms directly without the need for a torrent file. Main article:A technique called combines feeds with the BitTorrent protocol to create a content delivery system, further simplifying and automating content distribution.

Steve Gillmor explained the concept in a column for in December 2003. The discussion spread quickly among bloggers (Ernest Miller, etc.).

In an article entitled Broadcatching with BitTorrent, Scott Raymond explained:I want RSS feeds of BitTorrent files. A script would periodically check the feed for new items, and use them to start the download.

Then, I could find a trusted publisher of an RSS feed, and 'subscribe' to all new episodes of the show, which would then start downloading automatically – like the 'season pass' feature of the. — Scott Raymond, scottraymond.netThe RSS feed will track the content, while BitTorrent ensures content integrity with of all data, so feed subscribers will receive uncorrupted content.

One of the first and popular software clients ( and ) for broadcatching is. Other free software clients such as PenguinTV and KatchTV are also now supporting broadcatching. The BitTorrent web-service MoveDigital added the ability to make torrents available to any web application capable of parsing through its standard -based interface in 2006, though this has since been discontinued. Additionally, Torrenthut is developing a similar torrent that will provide the same features, and help bring the torrent community to standards. Alongside this release is a first application built using the API called PEP, which will parse any (RSS 2.0) feed and automatically create and seed a torrent for each enclosure found in that feed.

Throttling and encryption. Main article:Since BitTorrent makes up a large proportion of total traffic, some have chosen to 'throttle' (slow down) BitTorrent transfers. For this reason, methods have been developed to disguise BitTorrent traffic in an attempt to thwart these efforts. Protocol header encrypt (PHE) and are features of some BitTorrent clients that attempt to make BitTorrent hard to detect and throttle. As of November 2015, MooPolice, Halite, and the latest official BitTorrent client (v6) support MSE/PE encryption.

In September 2006 it was reported that some software could detect and throttle BitTorrent traffic masquerading as traffic.Reports in August 2007 indicated that was preventing BitTorrent seeding by monitoring and interfering with the communication between peers. Protection against these efforts is provided by the client-tracker traffic via an to a point outside of the Comcast network. Comcast has more recently called a 'truce' with BitTorrent, Inc. With the intention of shaping traffic in a protocol-agnostic manner. Questions about the ethics and legality of Comcast's behavior have led to renewed debate about.

In general, although encryption can make it difficult to determine what is being shared, BitTorrent is vulnerable to. Thus, even with MSE/PE, it may be possible for an ISP to recognize BitTorrent and also to determine that a system is no longer downloading but only uploading data, and terminate its connection by injecting RST (reset flag) packets.Multitracker Another unofficial feature is an extension to the BitTorrent metadata format proposed by John Hoffman and implemented by several indexing websites.

It allows the use of multiple trackers per file, so if one tracker fails, others can continue to support file transfer. It is implemented in several clients, such as,. Trackers are placed in groups, or tiers, with a tracker randomly chosen from the top tier and tried, moving to the next tier if all the trackers in the top tier fail.Torrents with multiple trackers can decrease the time it takes to download a file, but also have a few consequences:. Poorly implemented clients may contact multiple trackers, leading to more overhead-traffic. Torrents from closed trackers suddenly become downloadable by non-members, as they can connect to a seed via an open tracker.Implementations.

Main article:The BitTorrent specification is free to use and many clients are, so BitTorrent clients have been created for all common using a variety of. The, and are some of the most popular clients.Some BitTorrent implementations such as and are designed to run as servers. For example, this can be used to centralize file sharing on a single dedicated server which users share access to on the network. Server-oriented BitTorrent implementations can also be hosted by at facilities with high bandwidth Internet connectivity (e.g., a datacenter) which can provide dramatic speed benefits over using BitTorrent from a regular home broadband connection. Services such as can download files on BitTorrent for the user, allowing them to download the entire file by once it is finished.The supports BitTorrent, as does.

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Allows users to download Torrents directly from their browser using a. An increasing number of hardware devices are being made to support BitTorrent. These include routers and NAS devices containing BitTorrent-capable firmware like. Proprietary versions of the protocol which implement, encryption, and authentication are found within managed clients such as.Development An unimplemented (as of February 2008 ) unofficial feature is (SET), a technique for improving the speed at which peer-to-peer file sharing and content distribution systems can share data. SET, proposed by researchers Pucha, Andersen, and Kaminsky, works by spotting chunks of identical data in files that are an exact or near match to the one needed and transferring these data to the client if the 'exact' data are not present. Their experiments suggested that SET will help greatly with less popular files, but not as much for popular data, where many peers are already downloading it.

Andersen believes that this technique could be immediately used by developers with the BitTorrent file sharing system.As of December 2008, BitTorrent, Inc. Is working with Oversi on new Policy Discover Protocols that query the ISP for capabilities and network architecture information. Oversi's ISP hosted NetEnhancer box is designed to 'improve peer selection' by helping peers find local nodes, improving download speeds while reducing the loads into and out of the ISP's network. Legal issues.

Main article:Although the protocol itself is legal, problems stem from using the protocol to traffic copyright infringing works, since BitTorrent is often used to download otherwise paid (Blu-ray disc) content(s), such as movies and videogames. There has been much controversy over the use of BitTorrent trackers.

BitTorrent metafiles themselves do not store file contents. Whether the publishers of BitTorrent metafiles violate copyrights by linking to copyrighted works without the authorization of copyright holders is controversial. Various jurisdictions have pursued legal action against websites that host BitTorrent trackers.High-profile examples include the closing of,. Torrent website, formed by a Swedish group, is noted for the 'legal' section of its website in which letters and replies on the subject of alleged copyright infringements are publicly displayed. On 31 May 2006, The Pirate Bay's servers in Sweden were raided by Swedish police on allegations by the MPAA of copyright infringement; however, the tracker was up and running again three days later. In the study used to value NBC Universal in its merger with Comcast, Envisional examined the 10,000 torrent swarms managed by PublicBT which had the most active downloaders. After excluding pornographic and unidentifiable content, it was found that only one swarm offered legitimate content.In the United States, more than 200,000 lawsuits have been filed for copyright infringement on BitTorrent since 2010.

On 30 April 2012, the UK High Court ordered five ISPs to block BitTorrent search engine The Pirate Bay. (see )Security problems One concern is the. BitTorrent implementations often use for their communication. To achieve high bandwidths, the underlying protocol used is, which allows spoofing of source addresses of internet traffic. It has been possible to carry out in a P2P lab environment, where users running BitTorrent clients act as amplifiers for an attack at another service. However this is not always an effective attack because ISPs can check if the source address is correct.Challenges ', are those users who download more than they share. As BitTorrent is a collaborative distributed platform, there is a section of the community that wants solutions to punish and discourage such behaviour.

Malware Several studies on BitTorrent have indicated that there exist files, containing, available for download via BitTorrent. In particular, one small sample indicated that 18% of all executable programs available for download contained malware. Another study claims that as much as 14.5% of BitTorrent downloads contain, and that BitTorrent was used as the distribution mechanism for 47% of all zero-day malware they have found.BitErrant attack Due to collisions, an attacker can alter the execution path of the executable by serving altered chunks when the victim is downloading the executable using the BitTorrent protocol. Criticism of BitErrant attack.

In my college, Torrent downloads are blocked, so now I can’t download any large software. Please give a solution for how to download Torrent file. Is there any software available or not?

1. Go to the wrench menu > Settings > Under the Hood > Change proxy settings.. > LAN Settings and deselect the 'Use a proxy server for your LAN' checkbox.

   THIS MESSAGE COMING WHAT I CAN DO

2. our torrents are blocked by cyberoam.....
   any way to by pass it and download torrents files n the contents in it???

3. you can download any blocked file (including torrent files) by using:

   It lets you rename/encode the file you download so it bypasses any blocks exist on a specific file type.

4. some more solutions:

   Download Torrents Without A Client Via Torrent2Exe [Windows]
   //www.makeuseof.com/tag/download-torrents-without-a-client-via-torrent2exe-windows/

   How To Direct Download Any Torrent Files Using Torrific [broken link removed]

5. There are http torrent sites, where you can download via your web browser:

   Hope that helps..

6. Aha, you are in luck as we have a whole post dedicated to this particular problem. Read my colleague Jeffry's post on 5 Ways To Bypass Torrent Connection Blocking.
   Go over the comments too for more hints.

   Of course, the best bypass technique is to do the download from your home instead of using the college bandwidth :) Any malware infection could infect the whole college network, so you have that responsibility as a student too.