overview.html (9f308e198) - tor-webwml.git

9f308e19855d8351ec99acd436da01373a6a466b

convert the rest of the pag... Roger Dingledine authored 19 years ago	`1) <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" 2) "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">`
first cut of new website Roger Dingledine authored 20 years ago	`3) 4) <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> 5) <head> 6) <title>Tor: Overview</title>`
clean up my meta and br tags Roger Dingledine authored 20 years ago	`7) <meta name="Author" content="Roger Dingledine" />`
first cut of new website Roger Dingledine authored 20 years ago	`8) <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1" />`
convert the rest of the pag... Roger Dingledine authored 19 years ago	`9) <link rel="stylesheet" type="text/css" href="stylesheet.css" />`
list the favicon on every page Roger Dingledine authored 19 years ago	`10) <link rel="shortcut icon" type="image/x-icon" href="/favicon.ico" />`
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convert the rest of the pag... Roger Dingledine authored 19 years ago	`14) 15) <!-- TITLE BAR & NAVIGATION -->`
overview.html - apply task... Thomas Sjögren authored 19 years ago	`16)`
made a simple change to the... le@svn.torproject.org authored 19 years ago	`17) <div class="center"> 18)`
overview.html - apply task... Thomas Sjögren authored 19 years ago	`19) <table class="banner" border="0" cellpadding="0" cellspacing="0"> 20) <tr> 21) <td class="banner-left"></td> 22) <td class="banner-middle">`
howitworks is now obsolete... Roger Dingledine authored 19 years ago	`23) <a href="index.html">Home</a> 24) \| <a class="current">Overview</a>`
overview.html - apply task... Thomas Sjögren authored 19 years ago	`25) \| <a href="download.html">Download</a> 26) \| <a href="documentation.html">Docs</a>`
howitworks is now obsolete... Roger Dingledine authored 19 years ago	`27) \| <a href="support.html">Support</a>`
overview.html - apply task... Thomas Sjögren authored 19 years ago	`28) \| <a href="faq.html">FAQs</a>`
call it Volunteer in the na... Roger Dingledine authored 19 years ago	`29) \| <a href="volunteer.html">Volunteer</a>`
overview.html - apply task... Thomas Sjögren authored 19 years ago	`30) \| <a href="developers.html">Developers</a> 31) \| <a href="research.html">Research</a> 32) \| <a href="people.html">People</a> 33) </td>`
fix links to translation pages Roger Dingledine authored 19 years ago	`34) <td class="banner-right">`
Make website valid xhtml (t... Thomas Sjögren authored 19 years ago	`35) <a href="/"><img src="/images/en.png" alt="English" /></a> 36) <a href="/index.it.html"><img src="/images/it.png" alt="Italiano" /></a> 37) <a href="/index.de.html"><img src="/images/de.png" alt="Deutsch" /></a>`
fix links to translation pages Roger Dingledine authored 19 years ago	`38) </td> 39)`
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overview.html - apply task... Thomas Sjögren authored 19 years ago	`42)`
convert the rest of the pag... Roger Dingledine authored 19 years ago	`43) <!-- END TITLE BAR & NAVIGATION --> 44) 45) <div class="main-column">`
first cut of new website Roger Dingledine authored 20 years ago	`46)`
give Tor: Overview a differ... Roger Dingledine authored 20 years ago	`47) <h2>Tor: Overview</h2>`
Redo the website html, base... Roger Dingledine authored 19 years ago	`48) <hr />`
first cut of new website Roger Dingledine authored 20 years ago	`49) 50) <p>`
tor is no longer a network-... Roger Dingledine authored 19 years ago	`51) Tor is a network of virtual tunnels that allows people and groups to`
revised overview text Roger Dingledine authored 19 years ago	`52) improve their privacy and security on the Internet. It also enables`
Apply strunk&white, clarify... Nick Mathewson authored 19 years ago	`53) software developers to create new communication tools 54) with built-in privacy features. Tor provides the foundation for 55) a range of applications that allow organizations and individuals`
revised overview text Roger Dingledine authored 19 years ago	`56) to share information over public networks without compromising their 57) privacy.`
first cut of new website Roger Dingledine authored 20 years ago	`58) </p> 59) 60) <p>`
finally wrap the rest of to... Roger Dingledine authored 19 years ago	61) Individuals use Tor to keep websites from tracking them and their family 62) members, or to connect to news sites, instant messaging services, or the 63) like when these are blocked by their local Internet providers. Tor's <a 64) href="http://tor.eff.org/doc/tor-hidden-service.html">hidden services</a> 65) let users publish web sites and other services without needing to reveal 66) the location of the site. Individuals also use Tor for socially sensitive 67) communication: chat rooms and web forums for rape and abuse survivors, 68) or people with illnesses.
first cut of new website Roger Dingledine authored 20 years ago	`69) </p> 70) 71) <p>`
finally wrap the rest of to... Roger Dingledine authored 19 years ago	`72) Journalists use Tor to communicate more safely with whistleblowers and 73) dissidents. Non-governmental organizations (NGOs) use Tor to allow their 74) workers to connect to their home website while they're in a foreign 75) country, without notifying everybody nearby that they're working with 76) that organization.`
first cut of new website Roger Dingledine authored 20 years ago	`77) </p> 78) 79) <p>`
finally wrap the rest of to... Roger Dingledine authored 19 years ago	80) Groups such as Indymedia recommend Tor for safeguarding their members' 81) online privacy and security. Activist groups like the Electronic Frontier 82) Foundation (EFF) are supporting Tor's development as a mechanism for 83) maintaining civil liberties online. Corporations use Tor as a safe way 84) to conduct competitive analysis, and to protect sensitive procurement 85) patterns from eavesdroppers. A branch of the U.S. Navy uses Tor for 86) open source intelligence gathering, and one of its teams used Tor 87) while deployed in the Middle East recently. Law enforcement uses Tor 88) for visiting or surveilling web sites without leaving government IP 89) addresses in their web logs. 90) </p> 91) 92) <p> 93) The variety of people who use Tor is actually <a 94) href="http://freehaven.net/doc/fc03/econymics.pdf">part of what makes 95) it so secure</a>. Tor hides you among the other users on the network, 96) so the more populous and diverse the user base for Tor is, the more your 97) anonymity will be protected.
revised overview text Roger Dingledine authored 19 years ago	`98) </p> 99)`
clean up tor website furthe... Roger Dingledine authored 19 years ago	`100) <h3>Why we need Tor</h3>`
revised overview text Roger Dingledine authored 19 years ago	101) 102) <p> 103) Using Tor protects you against a common form of Internet surveillance 104) known as "traffic analysis." Traffic analysis can be used to infer 105) who is talking to whom over a public network. Knowing the source 106) and destination of your Internet traffic allows others to track your 107) behavior and interests. This can impact your checkbook if, for example, 108) an e-commerce site uses price discrimination based on your country or 109) institution of origin. It can even threaten your job and physical safety
website fixes suggested by... Roger Dingledine authored 19 years ago	`110) by revealing who and where you are. For example, if you're travelling 111) abroad and you connect to your employer's computers to check or send mail, 112) you can inadvertently reveal your national origin and professional`
Apply strunk&white, clarify... Nick Mathewson authored 19 years ago	`113) affiliation to anyone observing the network, even if the connection`
make it clearer there's mor... Roger Dingledine authored 19 years ago	`114) is encrypted.`
revised overview text Roger Dingledine authored 19 years ago	`115) </p> 116) 117) <p> 118) How does traffic analysis work? Internet data packets have two parts:`
website fixes suggested by... Roger Dingledine authored 19 years ago	`119) a data payload and a header used for routing. The data payload is`
revised overview text Roger Dingledine authored 19 years ago	`120) whatever is being sent, whether that's an email message, a web page, or an 121) audio file. Even if you encrypt the data payload of your communications, 122) traffic analysis still reveals a great deal about what you're doing and, 123) possibly, what you're saying. That's because it focuses on the header, 124) which discloses source, destination, size, timing, and so on. 125) </p> 126) 127) <p>`
website fixes suggested by... Roger Dingledine authored 19 years ago	`128) A basic problem for the privacy minded is that the recipient of your 129) communications can see that you sent it by looking at headers. So can`
revised overview text Roger Dingledine authored 19 years ago	130) authorized intermediaries like Internet service providers, and sometimes 131) unauthorized intermediaries as well. A very simple form of traffic 132) analysis might involve sitting somewhere between sender and recipient on 133) the network, looking at headers. 134) </p> 135) 136) <p> 137) But there are also more powerful kinds of traffic analysis. Some 138) attackers spy on multiple parts of the Internet and use sophisticated 139) statistical techniques to track the communications patterns of many
Apply strunk&white, clarify... Nick Mathewson authored 19 years ago	`140) different organizations and individuals. Encryption does not help against 141) these attackers, since it only hides the content of Internet traffic, not 142) the headers.`
revised overview text Roger Dingledine authored 19 years ago	`143) </p> 144)`
clean up tor website furthe... Roger Dingledine authored 19 years ago	`145) <h3>The solution: a distributed, anonymous network</h3>`
revised overview text Roger Dingledine authored 19 years ago	`146) 147) <p> 148) Tor helps to reduce the risks of both simple and sophisticated traffic 149) analysis by distributing your transactions over several places on the 150) Internet, so no single point can link you to your destination. The idea 151) is similar to using a twisty, hard-to-follow route in order to throw off`
Apply strunk&white, clarify... Nick Mathewson authored 19 years ago	`152) somebody who is tailing you—and then periodically erasing your`
revised overview text Roger Dingledine authored 19 years ago	`153) footprints. Instead of taking a direct route from source to 154) destination, data packets on the Tor network take a random pathway 155) through several servers that cover your tracks so no observer at any 156) single point can tell where the data came from or where it's going. 157) </p> 158)`
upcase 'tor' on website men... Roger Dingledine authored 19 years ago	`159) <img alt="Tor circuit step one" src="images/htw1.png" /> 160) <img alt="Tor circuit step two" src="images/htw2.png" />`
put ren's how-tor-works dia... Roger Dingledine authored 19 years ago	`161)`
revised overview text Roger Dingledine authored 19 years ago	`162) <p> 163) To create a private network pathway with Tor, the user's software or 164) client incrementally builds a circuit of encrypted connections through 165) servers on the network. The circuit is extended one hop at a time, and 166) each server along the way knows only which server gave it data and which`
Apply strunk&white, clarify... Nick Mathewson authored 19 years ago	`167) server it is giving data to. No individual server ever knows the`
revised overview text Roger Dingledine authored 19 years ago	`168) complete path that a data packet has taken. The client negotiates a 169) separate set of encryption keys for each hop along the circuit to ensure`
Apply strunk&white, clarify... Nick Mathewson authored 19 years ago	`170) that each hop can't trace these connections as they pass through.`
first cut of new website Roger Dingledine authored 20 years ago	`171) </p> 172)`
upcase 'tor' on website men... Roger Dingledine authored 19 years ago	`173) <img alt="Tor circuit step three" src="images/htw3.png" />`
first cut of new website Roger Dingledine authored 20 years ago	`174) 175) <p>`
revised overview text Roger Dingledine authored 19 years ago	176) Once a circuit has been established, many kinds of data can be exchanged 177) and several different sorts of software applications can be deployed 178) over the Tor network. Because each server sees no more than one hop in 179) the circuit, neither an eavesdropper nor a compromised server can use 180) traffic analysis to link the connection's source and destination. Tor 181) only works for TCP streams and can be used by any application with SOCKS 182) support. 183) </p> 184) 185) <p> 186) For efficiency, the Tor software uses the same circuit for connections 187) that happen within the same minute or so. Later requests are given a 188) new circuit, to keep people from linking your earlier actions to the new 189) ones.
first cut of new website Roger Dingledine authored 20 years ago	`190) </p> 191)`
upcase 'tor' on website men... Roger Dingledine authored 19 years ago	`192) <img alt="Tor circuit step four" src="images/htw4.png" />`
put ren's how-tor-works dia... Roger Dingledine authored 19 years ago	`193)`
clean up tor website furthe... Roger Dingledine authored 19 years ago	`194) <h3>Hidden services</h3>`
revised overview text Roger Dingledine authored 19 years ago	`195)`
first cut of new website Roger Dingledine authored 20 years ago	`196) <p>`
revised overview text Roger Dingledine authored 19 years ago	197) Tor also makes it possible for users to hide their locations while 198) offering various kinds of services, such as web publishing or an instant 199) messaging server. Using Tor "rendezvous points," other Tor users can 200) connect to these hidden services, each without knowing the other's 201) network identity. This hidden service functionality could allow Tor 202) users to set up a website where people publish material without worrying 203) about censorship. Nobody would be able to determine who was offering 204) the site, and nobody who offered the site would know who was posting to it.
first cut of new website Roger Dingledine authored 20 years ago	`205) </p>`
revised overview text Roger Dingledine authored 19 years ago	`206)`
clean up tor website furthe... Roger Dingledine authored 19 years ago	`207) <h3>Staying anonymous</h3>`
first cut of new website Roger Dingledine authored 20 years ago	`208) 209) <p>`
Apply strunk&white, clarify... Nick Mathewson authored 19 years ago	`210) Tor can't solve all anonymity problems. It focuses only on`
revised overview text Roger Dingledine authored 19 years ago	`211) protecting the transport of data. You need to use protocol-specific 212) support software if you don't want the sites you visit to see your`
website fixes suggested by... Roger Dingledine authored 19 years ago	`213) identifying information. For example, you can use web proxies such as 214) Privoxy while web browsing to block cookies and withhold information`
revised overview text Roger Dingledine authored 19 years ago	`215) about your browser type.`
first cut of new website Roger Dingledine authored 20 years ago	`216) </p> 217) 218) <p>`
revised overview text Roger Dingledine authored 19 years ago	`219) Also, to protect your anonymity, be smart. Don't provide your name`
website fixes suggested by... Roger Dingledine authored 19 years ago	`220) or other revealing information in web forms. Be aware that, like all`
revised overview text Roger Dingledine authored 19 years ago	`221) anonymizing networks that are fast enough for web browsing, Tor does not`
website fixes suggested by... Roger Dingledine authored 19 years ago	`222) provide protection against end-to-end timing attacks: If your attacker`
revised overview text Roger Dingledine authored 19 years ago	`223) can watch the traffic coming out of your computer, and also the traffic 224) arriving at your chosen destination, he can use statistical analysis to 225) discover that they are part of the same circuit. 226) </p> 227)`
clean up tor website furthe... Roger Dingledine authored 19 years ago	`228) <h3>The future of Tor</h3>`
revised overview text Roger Dingledine authored 19 years ago	`229) 230) <p>`
website fixes suggested by... Roger Dingledine authored 19 years ago	`231) Providing a usable anonymizing network on the Internet today is an 232) ongoing challenge. We want software that meets users' needs. We also 233) want to keep the network up and running in a way that handles as many 234) users as possible. Security and usability don't have to be at odds: 235) As Tor's usability increases, it will attract more users, which will 236) increase the possible sources and destinations of each communication, 237) thus increasing security for everyone.`
make usability/security dis... Roger Dingledine authored 19 years ago	`238) We're making progress, but we need your help. Please consider`
link to the new docs, move... Roger Dingledine authored 19 years ago	`239) <a href="/cvs/tor/doc/tor-doc-server.html">running a server</a>`
renamed all contribute.html... Andrew Lewman authored 19 years ago	`240) or <a href="volunteer.html">volunteering</a> as a <a`
revised overview text Roger Dingledine authored 19 years ago	`241) href="developers.html">developer</a>.`
first cut of new website Roger Dingledine authored 20 years ago	`242) </p> 243) 244) <p>`
clean up last paragraph of... Roger Dingledine authored 19 years ago	245) Ongoing trends in law, policy, and technology threaten anonymity as never 246) before, undermining our ability to speak and read freely online. These 247) trends also undermine national security and critical infrastructure by 248) making communication among individuals, organizations, corporations, 249) and governments more vulnerable to analysis. Each new user and server 250) provides additional diversity, enhancing Tor's ability to put control 251) over your security and privacy back into your hands.
first cut of new website Roger Dingledine authored 20 years ago	`252) </p> 253) 254) </div><!-- #main -->`
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decide on a format for cont... Roger Dingledine authored 20 years ago	`256) <div class="bottom" id="bottom">`
convert the rest of the pag... Roger Dingledine authored 19 years ago	`257) <i><a href="mailto:tor-webmaster@freehaven.net" class="smalllink">Webmaster</a></i> -`
decide on a format for cont... Roger Dingledine authored 20 years ago	`258) $Id$ 259) </div>`