Historical Analysis of the Onion Router and Its Forensic Challenges

Tor's hidden services are published on the Tor network, including search engines, directories, web / pop3 emails, private messages (PM), drop boxes, re-mails, bulletin boards (BBS), image bulletin boards, currencies and other services It is a website. Exchange, blogs, e-commerce, social networking, and microblogging are hosted using rendezvous points within the Tor network. Other Tor users can only connect to these hidden services by knowing the conference address (also known as access to the client's public key to access the hidden point of the hidden service It is done). Please contact. Like other tools,

TOR stands for onion router. This is a distributed open source network that allows people all over the world to use the Internet as an unknown user. This is done by forwarding the IP address information to the various nodes on the network. This helps users to prevent network monitors that do not provide space to secure the privacy of users, including traffic analysis, business activities, national security, interpersonal relationships and so on.

Aggressive Attack One measure for traffic analysis in an onion router is to "fill" the connection to a common bit rate. Padding may limit passive traffic analysis, but it is often resistant to active attacks due to the reasons shown in Figure 9. Tagging "or" polluting "traffic for each client by a group of onion router users filling traffic they send at a common rate, but failing upstream ISPs delays the packets with a unique timing pattern Suppose I want to. The onion router network handles each client's circuit separately and holds this distinguishable timing pattern (with some noise) during relay, and the attacker has a timing pattern at the egress than traffic is feasible There is a possibility to recognize. Please check the attack separately. Active attack does not have to go through only the timing mark circuit

Silk Road transfers computer messages via at least three separate computer servers using the underground computer network called "Onion Router" or "Tor" to pretend that user. The customer performs business using the virtual currency called Bitcoin. This site repeatedly guaranteed users that illegal transactions are included in the privacy aspect. FBI, DEA, IRS, and customs brokers hide the so-called off-grid computer servers in Latvia and Silkroad in the vicinity of Romania, copy the contents, monitor the purchaser and seller completing illegal transactions To do. It closed the site, seized its assets, including 26,000 bit coins worth about $ 4 million, and in October arrested a so-called operator Ross Ulbricht in San Francisco.