What Is TOR Browser? And How To Use It?

Tor is free software for enabling anonymous communication. The name is derived from an acronym for the original software project name "The Onion Router".Tor directs Internet traffic through a free, worldwide, volunteer network consisting of more than seven 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.

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 might try to de-anonymize the user by some means. One way this may be achieved is by exploiting vulnerable software on the user's computer. The NSA had a technique that targets a vulnerability - which they codenamed "EgotisticalGiraffe" - in an outdated Firefox browser version at one time bundled with the Tor package, and in general, targets Tor users for close monitoring under its  program. Attacks against Tor are an active area of academic research,  and are welcomed by the Tor Project itself

How to Use For Browser??

The easiest way to use Tor is to download the Tor Browser. This is a modified version of Firefox along with a bunch of other software that connects you to the Tor network.

Once you've downloaded the installer, you have two options: You can just install the software or you can check the installation file's GPG signature first. Some people like to check the installation file to make sure they've downloaded the proper version of the browser and not something that's been tampered with.

But checking the GPG signature is not a painless process and requires an additional software download. Nevertheless, if that's something you'd like to do, the Tor Project has a how-to explaining what's required

Installing Tor

Whether or not you've checked the GPG signature, the next step is to install the Tor browser itself.

You can install the Tor browser on a USB stick.

For Windows, the Tor Browser comes as an EXE file, so it's basically like installing any other program. The key difference is that the browser doesn't have the same default location as most programs. Instead, it offers your desktop as the install location.

The Tor browser does this because it is portable software and doesn't integrate into a Windows system the way typical programs do. This means you can run the Tor browser from almost anywhere—the Desktop, your documents folder, or even a USB drive.

When you arrive at the Choose install location window Click Browse... and then choose where you'd like to install the browser. As you can see in the image above, I installed it to a USB drive that I tote around on my key chain.

Once you've got your location selected, just press Install and Tor takes care of the rest.

Using the Tor Browser

Once the browser is installed, you'll have a plain old folder called Tor Browser. Open that and inside you'll see "Start Tor Browser.exe". Click that file and a new window opens asking whether you'd like to connect directly to the Tor network or if you need to configure proxy settings first.

Most people can simply connect directly to the Tor network to get started. (Click to enlarge.)

For most people, choosing the direct option is best, so choose Connect. A few seconds later a version of Firefox will launch and you are now connected to the Tor network and able to browser in relative anonymity.

To make sure you're connected to Tor go to whatismyip.com, which will automatically detect your location based on your Internet Protocol address. If your browser shows you coming from a location that is not your own, you are good to go. Just make sure you do all your anonymous browsing from the Tor Browser itself as other programs on your system are notconnected to Tor.

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