Original subtitles

In the previous lecture we learned that tour is on an amazing network that we can use in order to protect

our anonymity and privacy.

We learned that it works because it has a number of computers or nodes connected to the network.

And then when we send data through the network it will bounce over a minimum of three nodes before it

goes to the destination.

Now I also mentioned in the previous lecture that Tor allows connected devices to host or to offer services.

Now these services can be a simple Web site and because these Web sites are connected to tour they will

benefit from the anonymity that Tor offers and therefore they're usually referred to as Tawhid in services

or online services.

So this diagram right here would usually look more like this in real life.

So you'd have some nodes or relays which you can use in order to go to a certain destination on the

Internet.

But at the same time some of the connected nodes or some of the connected devices are actually acting

as online services.

So these are similar to normal Web sites that you see on the Internet but they exist within the Tor

network.

They also use a really smart Protocol developed by Tor which is designed to hide the identity of this

server offering the service and the client trying to access the service.

So whenever you try to access a tor service at any point of time both the client and the server offering

the service do not know where or who the other party is.

So let's say instead of trying to go to Google dot com you try to go to this online service right here.

What's going to happen is you're going to connect to the TOR network again connection right here is

not encrypted by tor but the ISP like I said the Internet service provider or any other entity trying

to censor your connection.

They want to be able to see that you're trying to access an online service.

They'll only be able to see that you're connecting to the terror network.

Then once you're in the network you're going to bounce your request over a random node you're going

to go to a second random node.

And finally instead of go into a third node then out to the Internet to another Web site on the Internet.

On the surface web you're going to stay within the Tor network and you're literally just going to go

to your online service.

Now whenever you try to communicate or connect to an online service the process is actually much more

complex than what's shown in this diagram.

It is done over a really smart protocol that is developed by tor so that when you connect to an online

service you want to be able to see or get information about the server offering this service at the

same time the server offering the online service or the hidden service will not be able to get information

about you regarding your location or anything that can identify you.

Again all of this done in order to protect the privacy and anonymity of both the server offering the

service and the user.

Now in the next lecture I'm going to show you how to connect to Tor how to access a hidden service and

you'll be able to understand this better.