Improving Tor using a TCP-over-DTLS Tunnel
... the number of OPs is estimated in the hundreds of thousands and there are only about one thousand active ORs ...
... the number of OPs is estimated in the hundreds of thousands and there are only about one thousand active ORs ...
18739A-AnonymityProtocols
... • Then use symmetric decryption and re-encryption to move data messages along the established circuits • Each node behaves like a mix; anonymity is preserved ...
... • Then use symmetric decryption and re-encryption to move data messages along the established circuits • Each node behaves like a mix; anonymity is preserved ...
23anon
... • Then use symmetric decryption and re-encryption to move data messages along the established circuits • Each node behaves like a mix; anonymity is preserved ...
... • Then use symmetric decryption and re-encryption to move data messages along the established circuits • Each node behaves like a mix; anonymity is preserved ...
The Great Firewall of China
... the entrance point or exit point of a “4-over-6” tunnel because the results were based on IPv4 TTLs. This is compounded by other problems with using TTLs, such as the fact that forged RSTs from China appear to now make attempts to choose TTLs that appear to be from the other end of the connection. I ...
... the entrance point or exit point of a “4-over-6” tunnel because the results were based on IPv4 TTLs. This is compounded by other problems with using TTLs, such as the fact that forged RSTs from China appear to now make attempts to choose TTLs that appear to be from the other end of the connection. I ...
Improving Tor using a TCP-over-DTLS Tunnel Joel Reardon Ian Goldberg Google Zurich
... TCP implementation in user-space is used to generate TCP/IP packets, which are sent over DTLS The other end injects the received packet into their user-level TCP stack, and reads from user-level sockets ...
... TCP implementation in user-space is used to generate TCP/IP packets, which are sent over DTLS The other end injects the received packet into their user-level TCP stack, and reads from user-level sockets ...
18739A-JFK-Anonimity
... Every diner will see two coins: his own and his right neighbor’s Each diner announces whether the two coins are the same. If he is the payer, he lies (says the opposite). Odd number of “same” NSA is paying; even number of “same” one of them is paying ...
... Every diner will see two coins: his own and his right neighbor’s Each diner announces whether the two coins are the same. If he is the payer, he lies (says the opposite). Odd number of “same” NSA is paying; even number of “same” one of them is paying ...
Large Scale Simulation of Tor: Modelling a Global Passive Adversary
... deployed low latency anonymous networks is not feasible. This paper describes the implementation of a large scale, discrete event based simulation of Tor, using the SSFNet simulator. Several global passive adversary attacks are implemented on a simulated Tor network comprised of approximately 6000 n ...
... deployed low latency anonymous networks is not feasible. This paper describes the implementation of a large scale, discrete event based simulation of Tor, using the SSFNet simulator. Several global passive adversary attacks are implemented on a simulated Tor network comprised of approximately 6000 n ...
slides - People
... • Goal of every anonymous communication scheme is to allow users to communicate while concealing information about who ...
... • Goal of every anonymous communication scheme is to allow users to communicate while concealing information about who ...
“CHEWBACCA” POS Malware
... Extracted magnetic stripe data is stored within the “system.log” file inside the user’s %temp% folder. ...
... Extracted magnetic stripe data is stored within the “system.log” file inside the user’s %temp% folder. ...
Notes
... ◆ Messages are sent through a sequence of mixes • Can also form an arbitrary network of mixes (“mixnet”) ...
... ◆ Messages are sent through a sequence of mixes • Can also form an arbitrary network of mixes (“mixnet”) ...
Marc Visnick_Slides
... leading from sender to receiver Main goal is to preserve anonymity Tor does not provide end-to-end security It does provide encryption “in the middle” ...
... leading from sender to receiver Main goal is to preserve anonymity Tor does not provide end-to-end security It does provide encryption “in the middle” ...
Software Technology
... Researchers mount successful attacks against popular anonymity network and show how to prevent them. Tor daily users = 2.5 million It is possible for an adversary to infer a hidden server location or the source of the information reaching a given Tor user This is done by analyzing the traffi ...
... Researchers mount successful attacks against popular anonymity network and show how to prevent them. Tor daily users = 2.5 million It is possible for an adversary to infer a hidden server location or the source of the information reaching a given Tor user This is done by analyzing the traffi ...
Tor (anonymity network)
Tor is free software for enabling anonymous communication. The name is an acronym derived from the original software project name The Onion Router. Tor directs Internet traffic through a free, worldwide, volunteer network consisting of more than six thousand relays to conceal a user's location and usage from anyone conducting network surveillance or traffic analysis. Using Tor makes it more difficult for Internet activity to be traced back to the user: this includes ""visits to Web sites, online posts, instant messages, and other communication forms"". Tor's use is intended to protect the personal privacy of users, as well as their freedom and ability to conduct confidential communication by keeping their Internet activities from being monitored. An extract of a Top Secret appraisal by the National Security Agency (NSA) characterized Tor as ""the King of high-secure, low-latency Internet anonymity"" with ""no contenders for the throne in waiting"", and the Parliamentary Office of Science and Technology deemed it, with approximately 2.5 million users daily ""by far the most popular anonymous internet communication system."" Furthermore, a July 2015 NATO analysis opines that ""the use of anonymisation technologies such as Tor will continue to thrive. Despite the attention that Tor has received worldwide, the technical and legal questions surrounding it remain relatively unexplored."" Onion routing is implemented by encryption in the application layer of a communication protocol stack, nested like the layers of an onion. Tor encrypts the data, including the destination IP address, multiple times and sends it through a virtual circuit comprising successive, randomly selected Tor relays. Each relay decrypts a layer of encryption to reveal only the next relay in the circuit in order to pass the remaining encrypted data on to it. The final relay decrypts the innermost layer of encryption and sends the original data to its destination without revealing, or even knowing, the source IP address. Because the routing of the communication is partly concealed at every hop in the Tor circuit, this method eliminates any single point at which the communicating peers can be determined through network surveillance that relies upon knowing its source and destination.An adversary unable to defeat the strong anonymity that Tor provides may try to de-anonymize the communication by other means. One way this may be achieved is by exploiting vulnerable software on the user's computer. The NSA has a technique that targets outdated Firefox browsers codenamed EgotisticalGiraffe, and targets Tor users in general for close monitoring under its XKeyscore program. Attacks against Tor are an active area of academic research, which is welcomed by the Tor Project itself.