WEBVTT 00:00.960 --> 00:01.380 Okay. 00:01.380 --> 00:08.370 So now that we have a basic understanding on how bitcoins work and how cryptocurrencies work in general, 00:08.610 --> 00:15.630 in the next lectures, I want to walk you through how to use cryptocurrencies and specifically bitcoins 00:15.630 --> 00:19.200 anonymously on the Internet and on the darknet. 00:19.770 --> 00:24.630 Now, first, before we can do anything, we have to create a wallet. 00:24.930 --> 00:31.860 What we mean by wallet is it's software that's going to hold our money or our cryptocurrency. 00:32.040 --> 00:38.030 Then we can use this wallet to send payments, receive payments, and so on. 00:38.040 --> 00:43.110 So you can think of it similar to the bank account that you get when you sign up with a bank or the 00:43.110 --> 00:46.290 dashboard that you get when you sign up with PayPal. 00:46.890 --> 00:54.040 Now there are a lot of web based wallets where you can access your currency online using a web browser. 00:54.060 --> 00:59.130 There are apps that you can get on your phones, and there are programs that you can install on your 00:59.130 --> 01:00.630 desktop computers. 01:00.900 --> 01:07.530 Now, since we're using tails, we're going to be using a wallet called electron that comes preinstalled 01:07.530 --> 01:08.190 entails. 01:08.220 --> 01:13.130 This is very important because as we know, Thales is a live operating system. 01:13.140 --> 01:14.160 It's amnesic. 01:14.160 --> 01:20.190 So if you install external programs, you'll have to install them every time you start Thales and less 01:20.190 --> 01:21.870 persistence is enabled. 01:22.620 --> 01:25.970 Another cool thing about Electron is it's really fast. 01:25.980 --> 01:30.030 It doesn't need to download the whole blockchain, which is pretty big. 01:30.360 --> 01:36.750 It uses an indexed version of it so you can use it as soon as you download or launch the program. 01:37.140 --> 01:42.240 And the wallets that you create with electron can be used from separate computers. 01:42.240 --> 01:48.690 So for example, if you destroy your Thales build, you can just go to another Thales and be able to 01:48.690 --> 01:52.650 restore your account and I'll show you how to do that later on in the course. 01:53.460 --> 01:54.870 Now let's go to Thales. 01:54.870 --> 01:59.700 And all of this will become much easier to understand as we do this practically. 02:00.590 --> 02:07.160 So the like I said, electron comes pre-installed with tails, so you don't need to install it and you 02:07.160 --> 02:12.740 can access it by going to applications, internet and click on electron. 02:13.580 --> 02:20.630 Now recently, a very dangerous vulnerability was discovered in a previous version of Electron, but 02:20.630 --> 02:23.450 this version was shipped with tails. 02:23.630 --> 02:30.770 And even though tails has been updated multiple times since that version, electron did not get updated 02:30.770 --> 02:37.970 because the latest version of Electron still doesn't have a Debian build, which is what tails is built 02:37.970 --> 02:38.540 on. 02:39.050 --> 02:44.900 So in this lecture, I'm going to show you how to manually install the latest version of Electron. 02:44.900 --> 02:49.070 And in the next lecture, we're actually going to use it now for you. 02:49.070 --> 02:54.230 In your case, you can launch it from here and follow what I'm going to show you in the next lecture. 02:54.230 --> 03:00.860 If the program gets stuck, then that means tails still doesn't include the latest version of Electron. 03:00.860 --> 03:06.110 And you'll have to come back to this lecture and install the latest version, as I'm going to show you 03:06.110 --> 03:06.890 right now. 03:07.820 --> 03:13.160 Now, to download the latest version of Electron, you need to go to their website electron dot org. 03:13.160 --> 03:15.170 I'll include that in the resources. 03:15.170 --> 03:16.970 We're going to go to downloads. 03:18.550 --> 03:22.900 And we're going to select the Linux image, the app image right here. 03:23.050 --> 03:31.210 One click and we're going to click on Save File and this will automatically be stored in our Tor browser 03:31.210 --> 03:31.850 directory. 03:31.870 --> 03:32.740 That's fine. 03:32.740 --> 03:37.810 And I'm going to click on Save and this will start downloading it for me. 03:38.770 --> 03:44.770 I'm also going to download the signature right here, so I'm going to right click this and save link 03:44.770 --> 03:48.820 as and again, this is going to my Tor browser directory. 03:48.820 --> 03:52.990 I'm going to click on Save and I'm going to scroll down. 03:54.310 --> 04:01.030 And I'm going to download the developer's public key by right clicking save link as. 04:01.540 --> 04:05.410 And again, it's going to go into my downloads and I'm going to click on Save. 04:06.070 --> 04:13.030 The reason why I downloaded the signature for the installer and the public key of the developer, Thomas, 04:13.030 --> 04:19.120 is because, like I explained earlier, when you download something from the internet, it can be modified 04:19.120 --> 04:21.210 by a number of entities. 04:21.220 --> 04:27.490 Therefore, where we downloaded the signature and we downloaded the public key of the developer and 04:27.490 --> 04:33.490 we're going to use the public key of the developer and the signature to verify that the file has not 04:33.490 --> 04:38.050 been tampered with since we downloaded it, since the developer signed it. 04:38.320 --> 04:42.370 I've actually explained how this works in details in my encryption section. 04:42.370 --> 04:48.280 So go back and revise that if this sounds a little bit vague, but basically right now I'm pretty sure 04:48.280 --> 04:49.750 the downloads are over. 04:49.750 --> 04:57.010 And if we go to my Tor browser directory, you'll see I have the program itself, this is Electrum, 04:57.010 --> 04:58.690 this is the executable. 04:58.690 --> 05:04.450 And we also have the signature for this program that has the exact same name as the program with the 05:04.450 --> 05:06.190 DOT ISC extension. 05:06.190 --> 05:14.470 And I have Thomas V dot a C file, which is the public key of the developer that made this program. 05:15.010 --> 05:21.340 So before I can do anything, I have to import this key right here to my keychain. 05:21.460 --> 05:23.410 And I showed you how to do that before. 05:23.410 --> 05:24.850 So I'm going to do it quickly. 05:24.850 --> 05:26.950 I'm going to go to my applications. 05:26.950 --> 05:29.410 I'm going to go to passwords and keys. 05:31.100 --> 05:32.720 I'm going to go to file. 05:33.640 --> 05:40.410 Import and I'm going to select the file, which is in my Tor browser, and it's this file right here. 05:40.420 --> 05:42.280 Thomas V dot ISC. 05:42.550 --> 05:50.710 Click on open, verify the details, click on import and this will import his key for me and to verify 05:50.710 --> 05:54.460 that I can go here and just look for Thomas. 05:54.460 --> 05:58.870 And as we can see, we have the developer key in here. 05:59.410 --> 06:06.490 So now, now that we have the key added, we can click on the signature right click it and open with 06:06.490 --> 06:07.810 verify signature. 06:07.810 --> 06:15.790 And this will give us a positive result if this executable right here did not get modified, since Thomas, 06:15.790 --> 06:19.540 the guy with the key, has created this executable. 06:19.840 --> 06:21.940 So we're going to click on Verify. 06:22.900 --> 06:25.840 And as you can see, it's telling us that this is valid. 06:25.840 --> 06:31.840 And like I explained before, don't worry about the untrusted part as long as it says it's valid. 06:31.840 --> 06:37.000 This means that the file did not get modified since it got signed by Thomas. 06:37.570 --> 06:43.720 So now we can go ahead and run this file and not worry about it because we know the file did not get 06:43.720 --> 06:45.700 modified since Thomas signed it. 06:45.700 --> 06:49.660 But before we do that, I'm actually going to copy this. 06:50.970 --> 06:54.330 And I'm going to put it in my persistent directory. 06:54.330 --> 06:57.420 So I'm going to right click here and paste. 06:58.080 --> 07:03.690 And the reason why I'm doing this, because, like, we know tails is live, it's amnesic. 07:03.690 --> 07:11.430 So every time we restart, all the files will be lost unless they are stored in the persistent directory. 07:11.970 --> 07:17.280 Now, if you don't have the persistent directory, that means persistence is not enabled for you. 07:17.310 --> 07:22.740 I cover this previously in the course, so please go back to that lecture and see how to enable this. 07:23.400 --> 07:30.030 Now also, before using electron, I'm going to go to applications and tails. 07:30.750 --> 07:33.240 We're going to click on Configure Persistence. 07:33.600 --> 07:41.100 I did cover this before, but I want you to make sure that personal data is enabled and if we scroll 07:41.100 --> 07:44.910 down, bitcoin client is enabled as well. 07:44.910 --> 07:47.100 And the reason why we need the settings. 07:47.100 --> 07:52.800 So when we create a wallet, the wallet information will be stored on this computer. 07:52.800 --> 07:56.790 So when we restart we won't have to restore the wallet every time. 07:56.790 --> 07:58.560 We'll just have to put the password. 07:59.190 --> 08:03.550 So I'm going to close this because everything is configured properly for me. 08:03.570 --> 08:07.290 And one last step, because I can run executables on Thales. 08:07.290 --> 08:09.750 This is a security measure that comes with Thales. 08:09.750 --> 08:17.640 You'll need to right click the file, go to its properties, go to permissions, and you need to check 08:17.640 --> 08:21.630 this box that says allow executing file as program. 08:22.170 --> 08:23.790 We're going to close this. 08:23.790 --> 08:31.470 And now every time you want to run electron, don't go to applications, internet come to persistence 08:31.470 --> 08:33.870 and double click this executable. 08:34.410 --> 08:37.140 Now, as you can see, the program has started. 08:37.140 --> 08:39.060 Now it doesn't have any wallets. 08:39.060 --> 08:42.120 That's why it's not asking us for a password or anything. 08:42.210 --> 08:44.730 But right now it's ready to be used. 08:44.730 --> 08:49.590 And in the next lecture, I'm going to walk you through the basics of this program, and we're going 08:49.590 --> 08:52.410 to create our first Bitcoin wallet.