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The Tor network (short for “The Onion Router”) is a free, open-source network that allows users to browse the internet anonymously and securely. It is designed to protect users’ privacy and anonymity by routing their internet traffic through a network of servers, or “nodes,” located around the world.

The Tor network works by encrypting the user’s internet traffic and then routing it through a series of nodes, each of which decrypts a layer of the encryption. The traffic is then re-encrypted and sent to the next node in the network, until it reaches its final destination. This process makes it difficult for anyone to trace the traffic back to the original user or to monitor the user’s online activity.

The Tor network is used by a wide range of people for a variety of purposes, including journalists, activists, and individuals who wish to protect their privacy online. It is also used by people who live in countries with repressive internet censorship regimes, as it allows them to access blocked websites and communicate securely.

While the Tor network provides a high level of privacy and security, it is important to note that it is not completely foolproof and that users should be aware of the limitations of the network. For example, the network can be slow due to the additional routing steps, and users may still be vulnerable to certain types of attacks, such as malware or phishing, if they are not careful.

The illusion of anonymity

Tor and VPNs are not silver bullets. Many advanced techniques have been developed and studied to de-anonymize encrypted Tor traffic over the years[1]. Most of those techniques are Correlation attacks that will correlate your network traffic in one way or another to logs or datasets. Here are some examples:

Correlation Attack

A correlation attack is a type of attack that is used to identify the association between two pieces of data that are seemingly unrelated. This can be used to link together various pieces of information about an individual or group, such as their online activities, location, and personal characteristics. Here are a few examples of correlation attacks:

  • Linking together different pieces of information about a user’s online activities, such as their browsing history or the websites they visit, in order to identify their true identity or location.
  • Analyzing social media activity or other online activity to identify patterns and associations that may not be immediately apparent to humans, such as the relationships between different individuals or groups.
  • Using machine learning algorithms to analyze large amounts of data and identify patterns and associations that may not be immediately apparent to humans.
  • Analyzing network traffic patterns to identify patterns and associations that may not be immediately apparent to humans, such as the relationships between different devices or users.

It is important to note that correlation attacks can be used for a wide range of purposes, including tracking and identifying individuals or groups who are trying to remain anonymous online, identifying patterns and trends in data, and predicting future behavior. To protect against correlation attacks, it is important to use privacy-enhancing tools and techniques, such as those provided by the Tor network, and to be aware of the types of data that you share online. It is also important to use strong, unique passwords and to enable two-factor authentication whenever possible, as these measures can help to protect against identity theft and other types of attacks.

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