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So as we learned before, the entire ledger used in bitcoins, the whole blockchain is public.

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So the ledger contains all transactions done using bitcoins for each transaction.

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Anybody can see the sender address, the receiver address and the amount.

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Now, if the sender and the receiver are using proper opsec and obtain their bitcoins anonymously,

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then these addresses will not be tied to their identities.

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But like I said, there are a number of ways that these addresses can tie to a person's identity.

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The easiest is if the person bought bitcoins using a coin exchange that requires identity verification,

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or if the person or the entity you're sending coins to has made their address public and is linked to

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an actual identity.

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For example, if you're sending money to unknown store or to unknown market.

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Therefore, based on this information, anyone can analyze the blockchain.

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They can know exactly the balance of each address by tracing the amount of money sent to this address

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so they can know how much money is in your wallet.

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They can track your spending habits, and based on that, they can profile you and serve you more things,

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more ads and so on.

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Not only that, but if you have a considerable amount of coins, then you'll become a target because

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people know that you have a lot of coins in your wallet, again, by tracing the amount of coins sent

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to your address.

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Not to mention the fact that if you're sending money to an entity that is linked to an actual identity

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or if your actual identity gets linked to your address, then this will reveal even more information

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that you might not want to be public.

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All of this was the incentive to making a more private cryptocurrency.

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There is a number of private cryptocurrencies.

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The most popular at the moment is Monero or XMR.

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Now it's similar to Bitcoin, it's decentralized, so there is no single entity that control it.

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But unlike Bitcoin, it is private.

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So if you analyze the whole blockchain, you won't be able to get useful information on who is sending

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money to whom and the amount sent.

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So you can see addresses, but the addresses used are temporary and secured.

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Therefore you can't see the actual sender, you can't see the actual receiver, and you can see the

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real amount being transferred.

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Therefore, what you analyze is not very useful.

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The transactions are untraceable and the sender and receiver are not likable.

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All of this is achieved using ring signatures, ring confidential transactions and stealth addresses.

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The exact way how all of this works is a little bit complex and it dives too much on how blockchain

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and cryptocurrencies work.

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Therefore, I'm not going to cover it in this course, but I will include useful resources in the resources

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section of this lecture, which you can read for further information.

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Now, unfortunately, Thales does not come with a Monero wallet.

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We have to manually install it, but installing it is very, very easy.

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So let's go to Thales and see how to do that.

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First of all, you need to go to the download page of the official Monero website.

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I'll include its link in the resources of this lecture and you want to scroll down to the Linux download

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link.

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Now I have the 64 bit version of Thales installed.

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Therefore I'm going to click in here to download the 64 bit version of the Monero wallet.

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Now, just like any other download, you want to click on Save File and select the location where you

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want to download it.

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So by default it goes into amnesia tor browser.

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And as you can see, I've already downloaded it in here, so I'm not going to click on Save.

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But in your case, you want to click on Save and wait for it to fully download the wallet for you.

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I'm going to click on Cancel because I've already downloaded it before this lecture to save time.

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And as you can see, I already have it here in my Tor browser directory.

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And before interacting with this file, just like any file we download from the Internet, we need to

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make sure that this file did not get modified as it was being downloaded because as explained before,

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anything that you download from the Internet can be edited and modified at a number of locations as

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it's being downloaded.

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So previously we show how to verify downloads using their PGP signature.

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The verification process really depends on the information the developer is giving us.

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So as you can see in this case and here, the developer is not giving us a pjp signature.

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Instead it's giving us a SHA two, five, six hash.

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So to verify a downloaded file with its SHA 256 hash, we need to go to applications accessories and

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we're going to use an application called GTK Hash.

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I'm going to open this application and in the file field in here, I'm going to select the file that

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I want to verify.

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It's hash.

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This is the file that I just downloaded.

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So I'm going to click in here and I'm going to go to Tor browser.

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And this is the file that we just downloaded.

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I'm going to click on Open and I'm going to click on hash to calculate its hash.

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Now we have the SHA two, five, six hash in here.

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And what I'm going to do is I'm going to copy all of this and compare it to the hash that the developer

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is giving us here on the download page.

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Now, as you can see, the hashes match.

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This means that the file did not get modified as it's been downloaded because if a single bit is changed

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in that file, the hash that I just calculated manually on my local computer will not correspond to

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the hash that we have on the Web page in here.

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So because the hashes are matching, this means that the file did not get modified since this hash right

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here got calculated.

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So we can interact with this file now safely as long as we trust the developer that gave us the file.

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So I'm going to right click this file because it's a package and I'm going to click on extract here

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to extract it.

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Okay, perfect.

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That's done.

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So you can leave it here.

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But if you leave it here, as you know, tales is amnesic.

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So when we restart the computer, these files will not exist.

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Therefore, I'm going to copy it and I'm going to paste it in my persistent directory.

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So right click and paste.

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And if we navigate inside it will actually see another directory for the application itself.

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So I'm actually just going to cut this and paste it outside just to make it easier to access.

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And I'm going to delete the empty one and I'm going to rename this one to just more narrow guy again,

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just to make it easier to access.

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And if we navigate inside this directory, you'll see we have a number of files that's needed by the

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wallet application.

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And the main file that starts the wallet is this file right here.

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The start GI Dot is huge.

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Now this is a batch file, which means that it can only be executed from the terminal, from the Linux

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terminal.

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Now, if you've done any of my other courses, this will be very, very easy for you.

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If you haven't, then don't worry about it.

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And the next lecture, I'll show you how to run it and create our first Monero wallet.