Tor - The Free Haven Project

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Tor: Big Picture●●●●Freely available (Open Source), unencumbered.Comes with a spec and full documentation:German universities implemented compatible JavaTor clients; researchers use it to study anonymity.Chosen as anonymity layer for EU PRIME project.200000+ active users.● PC World magazine named Tor one of the Top 100Products of 2005.2
Informally: anonymity means youcan't tell who did what“Who wrote this blog post?”“Who's been viewing my webpages?”“Who's been emailing patent attorneys?”3
Page 1: Tor: AnonymousCommunications for th
Page 5 and 6: We have to make some assumptionsabo
Page 7 and 8: Anonymity isn't steganography:Attac
Page 9 and 10: ...since “weak” anonymity... is
Page 11 and 12: Anonymity serves differentinterests
Page 13 and 14: Regular citizens don't want to bewa
Page 15 and 16: Law enforcement needs anonymityto g
Page 17 and 18: You can't get anonymity on your own
Page 19 and 20: Yes, bad people need anonymity too.
Page 21 and 22: IP addresses can be enough tobootst
Page 23 and 24: Low-latency systems are vulnerable
Page 25 and 26: The simplest designs use a singlere
Page 27 and 28: Add encryption to stop attackers wh
Page 29 and 30: So, add multiple relays so thatno s
Page 31 and 32: AliceA corrupt final hop can tell t
Page 33 and 34: Alice makes a session key with R1..
Page 35 and 36: Alice makes a session key with R1..
Page 37 and 38: Tor anonymizes TCP streams only:it
Page 39 and 40: Usability for server operators is k
Page 41 and 42: Server discovery is hard becausemis
Page 43 and 44: We redesigned our directory protoco
Page 45 and 46: Tor implements responder anonymityw
Page 47 and 48: We're currently the largest stronga
Page 49 and 50: Bandwidth capacity is increasing.49
Page 51 and 52: Other common abuses●●●●●S
Page 53 and 54:
Can we get a large number of semise
Page 55 and 56:
University Tor servers● MIT, RPI,
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Tor - The Free Haven Project

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