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Winny
Winny (also known as WinNY) is a Japanese peer-to-peer (P2P) file-sharing program developed by Isamu Kaneko, a research assistant at the University of Tokyo in 2002. Like Freenet, a user must add an encrypted node list in order to connect to other nodes on the network. Users choose three cluster words which symbolize their interests, and then Winny connects to other nodes which share these cluster words, downloading and storing encrypted data from cache of these neighbors in a distributed data store. If users want a particular file, they set up triggers (keywords), and Winny will download files marked by these triggers. The encryption was meant to provide anonymity, but Winny also included bulletin boards where users would announce uploads, and the IP address of posters could be discovered through these boards. While Freenet was implemented in Java, Winny was implemented as a Windows C++ application. The software takes its name from WinMX, where the M and the X are each advanc ...
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Winny Copyright Infringement Case
Winny copyright infringement criminal case in Japan was a Japanese criminal case in which Isamu Kaneko, the developer of peer-to-peer, P2P file-sharing program Winny, was indicted for aiding in copyright infringement. This was the first case in which a computer program developer faced a criminal charge for assisting in the copyright infringement of the program's users. In 2006, the found Kaneko guilty and fined him ¥1.5 million. On appeal, the in 2009 overturned the lower court's decision, acquitting Kaneko.Winny developer acquitted
, The Japan Times ONLINE, Oct. 9, 2009
Finally, in 2011, the Supreme Court of Japan upheld the acquittal, holding that Kaneko did not intentionally induce infringement and was therefore not responsible for the users' unlawful actions.


Background

In November 2003, two ...
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File Sharing In Japan
File sharing in Japan is notable for both its size and sophistication.Shirley Gene Field (2010)"Internet Piracy in Japan: Lessig’s Modalities of Constraint and Japanese File Sharing". University of Texas Masters Thesis. The Recording Industry Association of Japan has used a 2010 study to suggest that illegal downloads (which have been illegal since 2010) outnumber legal ones 10:1."Japan introduces piracy penalties for illegal downloads".
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In 2012, a law was passed that would invoke penalties for accessing pirated music or movies. In 2020, the

Share (P2P)
is the name for a closed-source P2P application being developed in Japan by ファイル倉庫, a pseudonym translating as 'file warehouse.' ''Share'' was developed to be the successor to Winny. Like Winny, ''Share'' functions using a distributed data store referred to as a cache with each computer acting as a node in the network. Netagent published a survey in June 2018 suggesting that Share was the third most popular p2p network in Japan after Winny and Perfect Dark (P2P) with approximately 10,000 nodes connecting each day over Golden Week, down from 30,000 in 2015. Background Share's logo refers to the Laughing Man, which is a fictional character from the anime series Ghost in the Shell: Stand Alone Complex, as an anonymous hacker. ''Share'' uses encryption to hide the identity of who is transferring or what they are transferring. It is non-centralized so it cannot be easily shut down and it supports multiple source "swarm" downloading. All files are transferred encrypte ...
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Perfect Dark (P2P)
is a peer-to-peer file-sharing (P2P) application from Japan designed for use with Microsoft Windows. It was launched in 2006. Its author is known by the pseudonym . Perfect Dark was developed with the intention for it to be the successor to both Winny and Share software. While Japan's Association for Copyright of Computer Software reported that in January 2014, the number of nodes connected on Perfect Dark () was less than on Share (), but more than on Winny (), Netagent in 2018 reported Winny being the largest with 50 000 nodes followed by Perfect Dark with 30 000 nodes followed by Share with 10 000. Netagent asserts that the number of nodes on Perfect Dark have fallen since 2015 while the numbers of Winny hold steady. Netagent reports that users of Perfect Dark are most likely to share books/manga. As of version 1.02 (2008), code-named "Stand Alone Complex", there is support for the program to run in English, an option that can be selected when the program is installed. ...
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WinMX
WinMX (Windows Music Exchange) is a freeware peer-to-peer file sharing program authored in 2000 by Kevin Hearn (president of Frontcode Technologies) in Windsor, Ontario (Canada). According to one study, it was the number one source for online music in 2005 with an estimated 2.1 million users. ''Frontcode Technologies'' itself abandoned development of WinMX in September 2005, but developers brought the service back online within a few days by releasing patches. WinMX continues to be used by a community of enthusiasts. Kevin Hearn released ''Tixati'' in 2009 and ''Fopnu'' in 2017. ''Fopnu'' is a client and a network with some similarities to WinMX. In 2021, he released DarkMX, a serverless file sharing client with built-in privacy preserving features and a built-in TOR client, as well as the ability to host a .onion file-sharing that is reachable via the TOR Browser. History Beginnings WinMX began its life as an OpenNAP client capable of connecting to several servers simultane ...
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Freenet
Freenet is a peer-to-peer platform for censorship-resistant, anonymous communication. It uses a decentralized distributed data store to keep and deliver information, and has a suite of free software for publishing and communicating on the Web without fear of censorship.What is Freenet?
, ''Freenet: The Free network official website''.
Taylor, Ian J. ''From P2P to Web Services and Grids: Peers in a Client/Server World''. London: Springer, 2005. Both Freenet and some of its associated tools were originally designed by Ian Clarke, who defined Freenet's goal as providing

Anonymous P2P
An anonymous P2P communication system is a peer-to-peer distributed application in which the nodes, which are used to share resources, or participants are anonymous or pseudonymous. Anonymity of participants is usually achieved by special routing overlay networks that hide the physical location of each node from other participants. Interest in anonymous P2P systems has increased in recent years for many reasons, ranging from the desire to share files without revealing one's network identity and risking litigationElectronic Frontier Foundation (2005)RIAA v. The People: Five Years Later. Retrieved March 5, 2008. to distrust in governments, concerns over mass surveillance and data retention, and lawsuits against bloggers. Motivation for anonymity There are many reasons to use anonymous P2P technology; most of them are generic to all forms of online anonymity. P2P users who desire anonymity usually do so as they do not wish to be identified as a publisher (sender), or reader (r ...
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Distributed Data Store
A distributed data store is a computer network where information is stored on more than one node, often in a replicated fashion. It is usually specifically used to refer to either a distributed database where users store information on a ''number of nodes'', or a computer network in which users store information on a ''number of peer network nodes''. Distributed databases Distributed databases are usually non-relational databases that enable a quick access to data over a large number of nodes. Some distributed databases expose rich query abilities while others are limited to a key-value store semantics. Examples of limited distributed databases are Google's Bigtable, which is much more than a distributed file system or a peer-to-peer network, Amazon's Dynamo and Microsoft Azure Storage. As the ability of arbitrary querying is not as important as the availability, designers of distributed data stores have increased the latter at an expense of consistency. But the high-speed r ...
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Matsuyama, Ehime
270px, Matsuyama City Hall 270px, Ehime Prefectural Capital Building is the capital city of Ehime Prefecture on the island of Shikoku in Japan and also Shikoku's largest city. , the city had an estimated population of 505,948 in 243541 households and a population density of 1200 persons per km². The total area of the city is . Geography Matsuyama is located in central Ehime Prefecture, facing the Seto Inland Sea to the north, the mountains of the Takanawa Peninsula to the north and east, and the Saragamine Mountain Range, an extension of the Shikoku Mountains, to the south. It is located on the northeastern portion of the Dōgo Plain. The city also includes the Kutsuna Islands, an archipelago of 29 islands in the Seto Inland Sea. Neighbouring municipalities Ehime Prefecture * Tōon *Imabari * Tobe * Masaki * Kumakōgen Climate Matsuyama has a humid subtropical climate (Köppen climate classification ''Cfa''; Trewartha climate classification ''Cf'') with hot summers and ...
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Bail
Bail is a set of pre-trial restrictions that are imposed on a suspect to ensure that they will not hamper the judicial process. Bail is the conditional release of a defendant with the promise to appear in court when required. In some countries, especially the United States, bail usually implies a bail bond, a deposit of money or some form of property to the court by the suspect in return for the release from pre-trial detention. If the suspect does not return to court, the bail is forfeited and the suspect may possibly be brought up on charges of the crime of failure to appear. If the suspect returns to make all their required appearances, bail is returned after the trial is concluded. In other countries, such as the United Kingdom, bail is more likely to consist of a set of restrictions that the suspect will have to abide by for a set period of time. Under this usage, bail can be given both before and after charge. For minor crimes, a defendant may be summoned to court witho ...
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Japanese Yen
The is the official currency of Japan. It is the third-most traded currency in the foreign exchange market, after the United States dollar (US$) and the euro. It is also widely used as a third reserve currency after the US dollar and the euro. The New Currency Act of 1871 introduced Japan's modern currency system, with the yen defined as of gold, or of silver, and divided decimally into 100 ''sen'' or 1,000 ''rin''. The yen replaced the previous Tokugawa coinage as well as the various ''hansatsu'' paper currencies issued by feudal ''han'' (fiefs). The Bank of Japan was founded in 1882 and given a monopoly on controlling the money supply. Following World War II, the yen lost much of its prewar value. To stabilize the Japanese economy, the exchange rate of the yen was fixed at ¥360 per US$ as part of the Bretton Woods system. When that system was abandoned in 1971, the yen became undervalued and was allowed to float. The yen had appreciated to a peak of ¥271 per US$ ...
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Microsoft Windows
Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for servers, and Windows IoT for embedded systems. Defunct Windows families include Windows 9x, Windows Mobile, and Windows Phone. The first version of Windows was released on November 20, 1985, as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUIs). Windows is the most popular desktop operating system in the world, with 75% market share , according to StatCounter. However, Windows is not the most used operating system when including both mobile and desktop OSes, due to Android's massive growth. , the most recent version of Windows is Windows 11 for consumer PCs and tablets, Windows 11 Enterprise for corporations, and Windows Server 2022 for servers. Genealogy By marketing ...
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