Sunday, 11 September 2016

How TOR works

Many of is use TOR browser and the network.

But how does Tor work?

The Tor network runs through the computer servers of thousands of volunteers (over 4,500 at time of publishing) spread throughout the world. Your data is bundled into an encrypted packet when it enters the Tor network. Then,
unlike the case with normal Internet connections, Tor strips away part of the packet's header, which is a part of the addressing information that could be used to learn things about the sender such as the operating system from which the message was sent.

Here is a video tutorial on how to install and run TOR browser on windows to access deep web - click here

Finally, Tor encrypts the rest of the addressing information, called the packet wrapper. Regular Internet connections don't do this either.

The modified and encrypted data packet is then routed through many of these servers, called relays, on the way to its final destination.The roundabout way packets travel through the Tor network is akin to a person taking a roundabout path through a city to shake a pursuer.
Each relay decrypts only enough of the data packet wrapper to know which relay the data came from, and which relay to send it to next. The relay then rewraps the package in a new wrapper and sends it on.

The layers of encrypted address information used to anonymize data packets sent through Tor are reminiscent of an onion, hence the name. That way a data packet's path through the Tor network cannot be fully traced.

Some regular Internet data packets are encrypted using a protocol called Secure Socket Layer (SSL) or its newer, stronger cousin Transport Layer Security (TLS). For example, if you submit your credit card information to an online store, that information travels across the network in an encrypted state to prevent theft.

However, even when you use SSL or TLS, it's still possible for others to intercept those packets and see the information's metadata who sent that encrypted information and who received it because the addressing wrappers in SSL or TLS are not encrypted. In Tor, they are, which hides the sender and receiver of a given transmission.

Further, if you use the Tor Browser to visit a website that does not use encryption to secure users' connections, then your data packet will not be encrypted when it makes the final hop from the last Tor relay to the website's server. That's because the data packet's destination lies outside the Tor network. So it's best to be sure that a website offers some kind of SSL or TLS encryption, usually denoted by an "https" instead of simply "http" in the Web address, before trying to access it anonymously.

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