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File sharing

technology Maturity 11-13 Next article →

File sharing is the practice of distributing or providing access to digital media. This media includes computer programs, multimedia like audio and video, documents, and electronic books. It is a fundamental part of how we move information across the digital world. People use various methods to store and transmit these files. Some use removable media or centralized servers on computer networks. Others use Internet-based hyperlinked documents. A common method is peer-to-peer networking, where computers connect directly to one another.

Shareaza 2.5.2.0 Screenshot English
Shareaza 2.5.2.0 Screenshot English

One major way to share is through peer-to-peer, or P2P, architecture. In a P2P system, files are stored on the computers of many different users. These files are often indexed on directory servers so people can find them. Some P2P systems are centralized, meaning they rely on a main server for discovery. Napster, released in June 1999, was an unstructured centralized P2P system. It required a central server to index files and help users find peers. Other systems, like Gnutella, are decentralized. In the Gnutella network, all connecting software is considered equal. This means the network has no central point of failure.

Shareaza 2.5.2.0 Screenshot English
Shareaza 2.5.2.0 Screenshot English

Another method involves cloud-based file syncing and sharing services. These services implement automated file transfers by updating files from a dedicated sharing directory. This directory exists on each user's networked devices. Files placed in these folders are often accessible through websites and mobile apps. This allows users to view files or work together on projects easily. Popular consumer-oriented services include Dropbox and Google Drive. Other platforms like ShareFile, Tresorit, WeTransfer, Smash, and Hightail also offer cloud storage and multi-device synchronization. There is also private file sharing used in organizations. These systems use internal networks and dedicated infrastructure like file servers. They use user authentication to ensure only authorized users can access the data.

The history of file sharing began with exchanging files on removable media. Early computers accessed remote files through filesystem mounting and FTP servers in the 1970s. Bulletin board systems appeared in 1978, and Usenet followed in 1979. In 1988, Internet Relay Chat enabled remote communication and file exchange. A major turning point occurred in 1991 with the standardization of mp3 encoding. This technology substantially reduced the size of audio files. By the late 1990s, mp3 files saw widespread use. In 1998, MP3.com and Audiogalaxy were established. This was also when the first mp3 player devices were launched.

Pro piracy demonstration
Pro piracy demonstration

Legal battles have shaped the evolution of file-sharing technology. In December 1999, Napster lost a lawsuit in A&M Records, Inc. v. Napster, Inc. The court ruled that Napster could not use the "transitory network transmission" safe harbor of the Digital Millennium Copyright Act because it controlled the network with a server. This led to Napster's shutdown. As users moved to other applications, new software like Gnutella, eDonkey2000, and Freenet arrived in 2000. Freenet became the first anonymity network in July 2000. Kazaa was released in 2001 and used the FastTrack network. FastTrack was distributed but assigned more traffic to "supernodes" to increase routing efficiency. The MPAA and RIAA filed lawsuits against Kazaa, Morpheus, and Grokster. This eventually led to the 2005 Supreme Court decision in MGM Studios, Inc. v. Grokster, Ltd.

Pro piracy demonstration
Pro piracy demonstration

Large-scale file-sharing sites have also faced government intervention. In 2012, the United States Department of Justice shut down Megaupload. This site was established in 2005 and claimed over 50,000,000 daily users. Its founder, Kim Dotcom, was arrested in New Zealand. The shutdown caused other sites, like FileSonic and Fileserve, to change their services. In 2009, the File Sharing Act was launched by Chairman Towns. This act prohibited sharing federal information among individuals. In the academic world, file sharing is often viewed as a violation of integrity. Companies like Chegg and Course Hero have become controversial due to how they handle academic files.

Pro piracy demonstration
Pro piracy demonstration

The economic impact of file sharing is a subject of intense debate. Many economic studies conclude that file sharing hurts sales. A literature review by Professor Peter Tschmuck looked at 22 studies. Roughly two-thirds of those studies found that unauthorized downloads had a negative impact on music sales. However, other economists have reached different conclusions. In 2004, researchers Felix Oberholzer-Gee and Koleman Strumpf found the effect on sales was statistically indistinguishable from zero. By 2010, they changed their minds and suggested sharing caused no more than 20% of the decline in sales. They noted that the production of music, books, and movies has actually increased since the advent of file sharing.

Pro piracy demonstration
Pro piracy demonstration
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