WEBVTT 00:01.470 --> 00:01.890 Okay. 00:01.890 --> 00:08.760 So now that we know that the normal file sharing services are not great when sharing sensitive files, 00:08.760 --> 00:14.250 even if they use end to end encryption such as Firefox Send Service. 00:14.400 --> 00:19.020 In this lecture, I want to show you a more private method to share files. 00:19.320 --> 00:21.690 Now, this method is peer to peer. 00:21.720 --> 00:28.440 Now, remember, we said the main problem was not about encryption, but it was the fact that our files 00:28.440 --> 00:32.130 were stored somewhere that we have no control on. 00:32.730 --> 00:38.820 So in the method that I'm going to show you in this lecture, our files will not be stored in a server 00:38.820 --> 00:40.200 that we don't control. 00:40.230 --> 00:41.950 It's going to be stored locally. 00:41.970 --> 00:43.440 It's going to be peer to peer. 00:43.440 --> 00:48.960 So the file will be shared from our computer to the computer of the person that we want to share the 00:48.960 --> 00:49.890 file with. 00:49.980 --> 00:52.210 It's going to use end to end encryption. 00:52.230 --> 00:56.140 It's going to benefit from the anonymity offered by the Tor network. 00:56.160 --> 00:59.760 Therefore, it's going to be more private and more anonymous. 01:00.820 --> 01:04.510 In this method, we're going to be using a tool called onion share. 01:04.690 --> 01:12.610 And to put this simply, the way this will work is it will create an onion service on your computer 01:12.610 --> 01:19.570 so others can access this onion service and download your file so you can think of it as if it's creating 01:19.570 --> 01:22.870 a dark web website on your local computer. 01:22.870 --> 01:27.790 And this website can only be used to download the files that you specify. 01:28.450 --> 01:34.120 To make this simpler, you can think of this the as the user that wants to download your file. 01:34.330 --> 01:40.570 And we all have seen this diagram of the Tor network and how when you try to access a hidden service, 01:40.570 --> 01:42.400 you go over three nodes. 01:42.400 --> 01:49.510 The user that you want to share the file with will end at an onion service that is sharing your file. 01:49.510 --> 01:54.310 And this onion service is running from your own local computer. 01:54.310 --> 02:01.360 So the file is shared directly from your computer, and you can shut down this sharing service whenever 02:01.360 --> 02:01.840 you want. 02:01.840 --> 02:07.300 Whenever you feel that you don't want to share the file anymore, or whenever you feel like your connection 02:07.300 --> 02:08.620 is being compromised. 02:09.130 --> 02:15.490 So as you can see in this example, we are not uploading our file to a server that we do not own or 02:15.490 --> 02:16.540 do not control. 02:16.570 --> 02:22.810 Therefore, it fixes the main issue with the method that I showed you with the Firefox service, and 02:22.810 --> 02:26.740 it benefits from all of the encryption implemented by the Tor network. 02:26.770 --> 02:30.550 Therefore, it's more private, more secure, and more anonymous. 02:32.150 --> 02:35.580 Now doing this is actually very, very simple and tells. 02:35.600 --> 02:37.020 So let me show you. 02:37.040 --> 02:39.300 I'm back at my file manager. 02:39.320 --> 02:43.040 I have the picture or the file that I want to share right here. 02:43.100 --> 02:49.670 And all you have to do is right click this file and click on share via onion share. 02:51.320 --> 02:55.100 As you can see, this will open the onion share window for you. 02:56.340 --> 03:03.060 You can see the file that I selected is already in here and you can click on Add Files to add more files 03:03.060 --> 03:05.280 to share with a specific person. 03:05.970 --> 03:11.190 You can add a full folder by clicking here and you can use the delete to delete files. 03:12.180 --> 03:16.440 You can also see the check box and here ticket stop sharing automatically. 03:16.470 --> 03:22.800 This basically means once someone downloads this file, the sharing will stop automatically. 03:22.920 --> 03:27.720 You can pick this to keep sharing the file until you manually stop it. 03:28.440 --> 03:33.120 Once you're happy with the files that you want to share, we're going to click on Start Sharing. 03:33.570 --> 03:40.170 And right now, when you see the yellow dot in here, this means that onion share is creating and starting 03:40.170 --> 03:43.390 the onion service that will share the files for you. 03:43.410 --> 03:45.230 So you want to be patient with this? 03:45.240 --> 03:46.710 It might take some time. 03:47.550 --> 03:54.210 And once this is done, as you can see, the circle will turn green and you will see a link to a hidden 03:54.210 --> 03:54.660 service. 03:54.660 --> 04:00.900 So you can see this looks very, very similar to the links that we use when accessing Darknet websites. 04:01.320 --> 04:08.760 You can click on copy URL to copy it and then you can share this link with anybody that you want to 04:08.760 --> 04:09.810 share the file with. 04:09.810 --> 04:15.930 So you can send it via email or you can send it using an instant message like what I'm going to do right 04:15.930 --> 04:16.470 now. 04:17.660 --> 04:20.670 So I'm going to paste the link in here. 04:20.690 --> 04:25.140 You can go ahead, enter to send it and then I'm going to go to a second computer. 04:25.160 --> 04:28.250 We're going to pretend that this is the recipient computer. 04:28.460 --> 04:34.760 As you can see, they got a message with a link in here and all they have to do is click on this link. 04:35.090 --> 04:41.930 Now, keep in mind, this is a hidden service or an onion service link, so it can only be accessed 04:41.930 --> 04:47.870 using the Tor browser or using a computer that is configured to use the Tor network. 04:47.870 --> 04:52.670 So this service is only accessible within the Tor network. 04:53.210 --> 04:57.610 As you can see, once this loads you will get a very simple page. 04:57.620 --> 05:03.470 It has the file name, it has the size, and if you click on download, it will download the file for 05:03.470 --> 05:04.040 you. 05:04.730 --> 05:06.380 I'm going to click on Save. 05:07.280 --> 05:10.720 And this will automatically go to the Tor browser directory. 05:10.730 --> 05:12.560 I'm going to click on Save. 05:13.310 --> 05:14.060 And perfect. 05:14.060 --> 05:18.320 The download is complete and we can verify this by going here. 05:19.130 --> 05:22.810 Now as you can see, the file has a zip format. 05:22.820 --> 05:28.790 It's not an image and you will always get the file in a zip format when using onion share. 05:28.790 --> 05:31.340 So you have to uncompressed this file. 05:31.340 --> 05:38.360 And to do that, we're going to right click the file, click on extract here and go inside the directory 05:38.360 --> 05:39.890 that just got created. 05:39.890 --> 05:44.090 And as you can see, we have the image that we wanted to share. 05:44.930 --> 05:51.920 Now, if you actually go back to the computer that started sharing, you will see that in the status 05:51.920 --> 05:52.220 bar. 05:52.220 --> 05:58.070 It's telling us that someone has loaded the download page and that someone has downloaded the file. 05:58.700 --> 06:05.000 So if you actually ticked this box, this would have stopped sharing the file automatically because 06:05.000 --> 06:11.300 someone has downloaded the file, or if you want to stop it manually, you can click on Stop Sharing 06:11.330 --> 06:12.500 to Stop Sharing. 06:12.500 --> 06:19.670 So now if anyone tries to access this link again, so if I refresh here, you'll see that this page 06:19.670 --> 06:20.810 will not load. 06:22.080 --> 06:26.150 Therefore you have full control over the files that you want to share. 06:26.160 --> 06:29.600 You can start and stop sharing them any time you want. 06:29.610 --> 06:36.180 The files will not be placed in any computer that you do not have control on, so it will only be placed 06:36.180 --> 06:41.340 on your computer and you'll benefit from towards anonymity and privacy. 06:41.370 --> 06:47.040 Therefore, this is a much more private method of sharing sensitive files.