WEBVTT 00:00.780 --> 00:07.830 So as we know from the previous lectures, Thales is alive and an amnesic operating system. 00:08.340 --> 00:14.310 What we mean by this is it leaves no traces on the computer that it gets used on. 00:14.610 --> 00:18.820 And it does this by never using the internal storage. 00:18.840 --> 00:22.680 It runs completely from the RAM, which is securely wiped. 00:22.680 --> 00:30.540 Once you turn off or restart the computer, then when that computer boots it will boot into its default 00:30.540 --> 00:31.880 operating system. 00:31.890 --> 00:38.490 The system will work exactly the same way that it was working before, and even if the whole computer 00:38.490 --> 00:45.510 gets inspected, there will be no traces of what you've done, and there will even be no traces of tails 00:45.510 --> 00:47.700 being used on that computer. 00:49.280 --> 00:53.390 Now this is a great feature that serves the main purpose of Thales. 00:53.390 --> 01:01.070 So it improves security because even if someone manages to hack into that computer and install malware 01:01.070 --> 01:07.670 or change the settings to compromise your privacy and anonymity, once you restart and boot into details, 01:07.670 --> 01:12.080 everything will be removed because nothing can be stored on that system. 01:12.470 --> 01:18.740 Not only that, but if you are dealing with sensitive files, you can do so without worrying about someone 01:18.740 --> 01:24.170 being able to recover these files because they will never be stored on the system. 01:24.740 --> 01:30.950 So these are great features that serve the main purpose of Thales, which is an operating system that 01:30.950 --> 01:34.700 is designed to improve our anonymity and privacy. 01:35.270 --> 01:41.990 But this feature is also a little bit inconvenient because, like we said, we cannot store anything 01:41.990 --> 01:43.040 on the system. 01:43.040 --> 01:49.850 So not only that we can store files and passwords or keys, which is something that we might want to 01:49.850 --> 01:50.390 do. 01:50.570 --> 01:55.130 We also can save any changes we make to any of the programs. 01:55.130 --> 02:00.320 For example, if you configure the mail client or if you change it to our settings, or even if you 02:00.320 --> 02:07.730 connect to a wi fi network, all of these settings will be removed and forgotten once you restart or 02:07.730 --> 02:09.260 boot into Thales again. 02:09.260 --> 02:14.540 So every time you boot entails, you'll have to go and connect to the network that you always connect 02:14.540 --> 02:14.990 to. 02:15.020 --> 02:17.540 You'll have to go and change the Tor browser settings. 02:17.540 --> 02:23.660 If you change them, if you set up a mail client, you'll have to go and set it up again, which can 02:23.660 --> 02:26.540 be a bit troublesome and take a bit of time. 02:27.410 --> 02:32.150 Now, the solution to this is to enable persistence on tells. 02:33.000 --> 02:39.780 Persistence allows us to store files, passwords, keys or program settings that we modify. 02:40.470 --> 02:48.960 It does this by encrypting whatever that's left on the USB flash drive so it still doesn't use the internal 02:48.960 --> 02:49.410 storage. 02:49.410 --> 02:55.980 The internal storage will still remain untouched and it will only rely on the space remaining on that 02:55.980 --> 02:57.180 USB stick. 02:57.480 --> 03:00.870 It will encrypt that space to improve its security. 03:00.990 --> 03:04.950 And then when you log in, you will have two options. 03:04.950 --> 03:12.840 You can log in with the live default option where nothing is stored, or you can unlock the persistent 03:12.840 --> 03:20.610 storage where you'll be able to store files in a specific directory, install programs, edit settings 03:20.610 --> 03:24.750 and everything will be stored like any other operating system. 03:25.920 --> 03:29.820 So with this, you'll be able to store files, passwords, keys. 03:29.820 --> 03:32.580 Like I said, you'll be able to modify settings. 03:32.580 --> 03:38.780 So if you connect to a network or if you log into a mail client, all of these settings will be stored. 03:38.790 --> 03:42.150 So when you log in again, you won't have to do them again. 03:42.210 --> 03:46.890 You'll also be able to install programs or browser plug ins and so on. 03:48.120 --> 03:53.790 Now, the last two benefits are in red for a reason, because you need to be careful when you're doing 03:53.790 --> 04:00.270 these things, because you need to keep in mind that those was made with security in mind. 04:00.270 --> 04:07.410 So all of the programs that come preinstalled in it are configured in a way to protect your anonymity 04:07.410 --> 04:08.450 and privacy. 04:08.460 --> 04:15.090 Therefore, when you modify these settings, or if you install more programs, these new programs or 04:15.090 --> 04:20.010 these modified settings might compromise your anonymity and privacy. 04:20.010 --> 04:25.500 So only install programs or modify settings if you know what you're doing. 04:26.250 --> 04:34.080 Not only that, but Tor and Thales work best when it is hard to distinguish between people that are 04:34.080 --> 04:35.580 using these systems. 04:35.640 --> 04:41.460 Therefore, when you modify settings or install extra programs, you're becoming more unique. 04:41.460 --> 04:48.690 Therefore, it would be easier to detect you because you're more distinguishable than other users than 04:48.690 --> 04:52.860 the people that are using Tor and Thales with the default settings. 04:54.240 --> 05:00.630 So with keeping all of this in mind, in the next lecture, I'm going to show you how to enable persistence 05:00.630 --> 05:01.650 on tails.