Bram Cohen
Born	1975
Residence	San Francisco Bay Area, California
Occupation	CEO, BitTorrent, Inc.
Known for	BitTorrent
Website http://bitconjurer.org

Bram Cohen (born 1975) 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. Year 1975 ( MCMLXXV) was a Common year starting on Wednesday (link will display full calendar of the Gregorian calendar. The San Francisco Bay Area, commonly known as the Bay Area, or the Bay, is a geographically and ethnically diverse metropolitan region that surrounds the California ( is a US state on the West Coast of the United States, along the Pacific Ocean. A chief executive officer ( CEO) or chief executive is typically the highest-ranking corporate officer ( executive) or administrator BitTorrent Inc, headquartered in San Francisco, California, is an American Corporation that develops peer-assisted Internet content delivery BitTorrent is a Peer-to-peer File sharing protocol used to distribute large amounts of Data. Year 1975 ( MCMLXXV) was a Common year starting on Wednesday (link will display full calendar of the Gregorian calendar. The United States of America —commonly referred to as the A programmer is someone who writes Computer software. The term computer programmer can refer to a specialist in one area of computer programming or to a generalist For other uses of the term see Peer-to-peer (disambiguation For peer-to-peer networks used for file sharing see File sharing BitTorrent is a Peer-to-peer File sharing protocol used to distribute large amounts of Data. See Shared resource for the conventional meaning of file sharing File sharing refers to the providing and receiving of digital files over a BitTorrent is a Peer-to-peer program developed by Bram Cohen and BitTorrent Inc He is also the co-founder of CodeCon, organizer of the San Francisco Bay Area P2P-hackers meeting, and the co-author of Codeville. CodeCon is a conference for hackers and technology enthusiasts The San Francisco Bay Area, commonly known as the Bay Area, or the Bay, is a geographically and ethnically diverse metropolitan region that surrounds the Codeville is a Revision control Computer program. It was written by Ross Cohen using Python, with some design work done by Bram Cohen

He currently lives in the San Francisco Bay Area with his wife Jenna and their two children. The San Francisco Bay Area, commonly known as the Bay Area, or the Bay, is a geographically and ethnically diverse metropolitan region that surrounds the

Contents 1 Early life and career 2 BitTorrent 2.1 BitTorrent and the MPAA 3 Other interests 4 References 5 External links

Early life and career

Cohen grew up in the Upper West Side of Manhattan, New York City, New York. The Upper West Side is a neighborhood of the borough of Manhattan in New York City that lies between Central Park and the Hudson River Manhattan Island, in New York Harbor, is much the largest part of the Borough of Manhattan, one of the Five Boroughs which form the City of New York The City of New York New York ( is a state in the Mid-Atlantic and Northeastern regions of the United States and is the nation's third most populous He learned the BASIC programming language at age 5 on his family's Timex Sinclair computer. In Computer programming, BASIC (an Acronym for Beginner's All-purpose Symbolic Instruction Code) is a family of High-level programming languages Timex Sinclair was a Joint venture between the British company Sinclair Research and Timex Corporation in an effort to gain an entry into the Cohen passed the American Invitational Mathematics Examination to qualify for the United States of America Mathematical Olympiad (USAMO) while he attended Stuyvesant High School in New York City. The American Invitational Mathematics Examination (or AIME) is a 15-question 3-hour test given since 1983 to those who rank in the top 5% (or score at least 100 on the The United States of America Mathematical Olympiad ( USAMO) is a prestigious High school Mathematics Competition held annually in the United Stuyvesant High School ( IPA: /ˈstаɪvɛsənt/ commonly referred to as Stuy ( IPA: /ˈstаɪ/ is a New York City Public high school He graduated from Stuyvesant in 1993^[1] and attended the University at Buffalo. State University of New York at Buffalo, commonly known as University at Buffalo (UB is a Coeducational public research University, which He later dropped out of college to work for several dot com companies throughout the mid to late 1990s, the last being MojoNation, an ambitious but ill-fated project he worked on with Jim McCoy. A Dot-com company, or simply a dot-com, is a company that does most of its business on the Internet, usually through a Website that uses the popular Year 1990 ( MCMXC) was a Common year starting on Monday (link displays the 1990 Gregorian calendar) Mnet is a distributed Peer to peer, file store (A Distributed file store is a shared virtual space into which you can put and from which you can

MojoNation allows people to break up confidential files into encrypted chunks and distribute those pieces on computers also running the software. If someone wanted to download a copy of this encrypted file, he would have to download it simultaneously from many computers. This concept, Cohen thought, was perfect for a file sharing program, since programs like KaZaA take a long time to download a large file because the file is (usually) coming from one source (or "peer"). See Shared resource for the conventional meaning of file sharing File sharing refers to the providing and receiving of digital files over a Kazaa Media Desktop (once capitalized as " KaZaA " but now usually written " Kazaa " is a Peer-to-peer File sharing application Cohen designed BitTorrent to be able to download files from many different sources, thus speeding up the download time, especially for users with faster download than upload speeds. To download is to receive data from a remote or central system such as a Webserver, FTP server, mail server or other similar systems To download is to receive data from a remote or central system such as a Webserver, FTP server, mail server or other similar systems Thus, the more popular a file is, the faster a user will be able to download it, since many people will be downloading it at the same time, and these people will also be uploading the data to other users.

BitTorrent

In April 2001, Cohen quit MojoNation and began work on BitTorrent. April 2001: January - February - March - April - May - June - July - August - September Cohen unveiled his novel ideas at the first CodeCon conference, which he and his roommate Len Sassaman created as a showcase event for novel technology projects after becoming disillusioned with the state of technology conferences. CodeCon is a conference for hackers and technology enthusiasts Len Sassaman (born 1980) advocate for Privacy and current maintainer of the Mixmaster anonymous remailer code and remop of the randseed remailer It remains an event for those seeking information about new directions in software, though BitTorrent continues to lay claim to the title of "most famous presentation".

Cohen wrote the first BitTorrent client implementation in Python, and several other programs have since implemented the protocol. Python is a general-purpose High-level programming language. Its design philosophy emphasizes programmer productivity and code readability A BitTorrent client is a program that manages torrent downloads

In the summer of 2002, Cohen collected free pornography to lure beta testers to use the program. See also 2002 (disambiguation Year 2002 ( MMII) was a Common year starting on Tuesday of the Gregorian calendar. Pornography or porn is the explicit depiction of Sexual subject matter with the sole intention of sexually exciting the viewer A software release is the distribution whether public or private of an initial or new and upgraded version of a Computer software product ^[2] BitTorrent gained its fame for its ability to quickly share large music and movie files online. Cohen himself has claimed he has never violated copyright law using his software, and he suspects the Motion Picture Association of America would love to make a legal example of him if he did. Regardless, he is outspoken in his belief that the current media business was doomed to being outmoded despite the RIAA and MPAA's legal or technical tactics, such as digital rights management. Digital rights management ( DRM) is a generic term that refers to Access control technologies used by hardware manufacturers publishers and Copyright holders In May 2005, Cohen released a trackerless beta version of BitTorrent. A BitTorrent tracker is a server which assists in the communication between peers using the BitTorrent protocol.

In late 2003, Cohen served a short stint at Valve Software to work on Steam, their digital distribution system introduced for Half-Life 2. Year 2003 ( MMIII) was a Common year starting on Wednesday of the Gregorian calendar. Valve Corporation is an American video game development company based in Bellevue Washington, USA that was founded in 1996, and made famous Steam is a Digital distribution, Digital rights management, Multiplayer Digital distribution (Also known as digital delivery and Electronic software distribution) is the principle of providing digital information and content Half-Life 2 is a Science fiction First-person shooter computer game and the sequel to the highly acclaimed Half-Life

By 2004, he had left Valve and formed BitTorrent, Inc. with his brother Ross Cohen and business partner Ashwin Navin. BitTorrent Inc, headquartered in San Francisco, California, is an American Corporation that develops peer-assisted Internet content delivery Ashwin Navin is the President and Co-Founder of BitTorrent Inc

BitTorrent and the MPAA

By mid 2005, BitTorrent, Inc. was funded by venture capitalist David Chao from Doll Capital Management, and in late 2005 Cohen and Navin made a deal with the MPAA to remove links to illegal content on the official BitTorrent website. The deal was with the seven largest studios in America. The agreement means the site will comply with procedures outlined in the Digital Millennium Copyright Act. The Digital Millennium Copyright Act (DMCA is a United States Copyright Law which implements two 1996 treaties of the World Intellectual Property ^[3]

Other interests

Cohen's hobbies include original origami and juggling up to five balls, but his main interest is in recreational mathematics. (from oru meaning "folding" and kami meaning "paper" is the ancient Japanese Art of Paper folding. Juggling is a physical human skill involving the movement of objects usually through the air for entertainment (see Object manipulation) Recreational mathematics is an umbrella term referring to Mathematical puzzles and Mathematical games. Cohen maintains a blog ^[4] where he frequently discusses trust metrics with Raph Levien, as well as money systems, games of skill, and other math-related topics. A blog (a contraction of the term " Web log " is a Web site, usually maintained by an individual with regular entries of commentary descriptions of In Psychology and Sociology, a trust metric is a measure of how a member of a group is trusted by the other members Raph Levien is an influential member of the Free software developer community through his creation of the Advogato virtual community and his work with the free software He is also a twisty puzzle enthusiast. Magic polyhedron is a term for a specific type of Puzzle also known as twisty puzzles, the most popular of which is Rubik's Cube.

Cohen claims he has Asperger syndrome^[2][5] based on a self diagnosis. Asperger syndrome (also called Asperger's syndrome, Asperger's disorder, Asperger's or AS) is the Autism spectrum disorder (ASD Self-diagnosis is the process of diagnosing, or identifying medical conditions in oneself ^[6]

References

External links

• Bram Cohen's home page
• Bram Cohen's blog
• Official website for BitTorrent
• Interview with Cohen about BitTorrent and CodeCon

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