WEBVTT 00:00.450 --> 00:05.480 There is a point where every piece of mass storage has to go. 00:05.610 --> 00:07.620 And that's what this episode is all about. 00:07.680 --> 00:09.040 Data destruction. 00:09.120 --> 00:15.660 Now you got to be careful because on the security plus you'll hear another term media sanitation for 00:15.660 --> 00:19.380 me if I'm going to destroy the data on something. 00:19.470 --> 00:21.700 I will also be sanitizing the media. 00:21.700 --> 00:24.240 So to me these terms are synonymous. 00:24.240 --> 00:29.150 Now we've got three levels of data destruction that I want to talk about. 00:29.250 --> 00:37.370 The first one I want to talk about is cleary clearing simply means to use some internal command within 00:37.370 --> 00:40.640 the mass storage device to make the data go away. 00:40.910 --> 00:46.640 The most classic example of this would be running an erase command from the Command Prompt of a hard 00:46.640 --> 00:48.690 drive to erase it on there. 00:48.690 --> 00:53.760 Now we all know that simply running erase commands isn't enough. 00:53.780 --> 01:00.230 There are studies that show that you can actually erase a hard drive up to seven times and still be 01:00.230 --> 01:01.250 able to get the data. 01:01.250 --> 01:03.300 Now I personally have never seen that. 01:03.310 --> 01:06.910 However it might be an old wives tale but it does happen. 01:07.130 --> 01:13.550 So pretty much today what we do more than anything else is we use wiping programs wiping programs will 01:13.550 --> 01:19.340 begin at the very beginning of a drive and begin to write either all zeros or all ones or random ones 01:19.340 --> 01:23.030 and zeros from the beginning of the drive to the end of the drive. 01:23.090 --> 01:25.680 Therefore we are completely destroying the data. 01:25.940 --> 01:32.180 The nice part about clear is clear means that you'll still be able to use the drive for something else 01:32.840 --> 01:40.640 because the next level is what we call purge purge means to do something to the device externally to 01:40.640 --> 01:42.140 make the data go away. 01:42.380 --> 01:49.760 And probably one of the best examples of a purge is a degauss or a decal or is a machine with a really 01:49.760 --> 01:55.730 strong magnetic field and you take your mass storage device and you put it in the degauss or for a certain 01:55.730 --> 02:02.390 amount of time and when it comes out of the degauss or all of the data is destroyed however Perge also 02:02.390 --> 02:06.130 means that the device is basically not useful anymore. 02:06.290 --> 02:10.370 So once you run it through a degauss or you're gonna just throw it in the trash because it's no longer 02:10.370 --> 02:11.660 any good. 02:11.660 --> 02:15.680 Another example of a purge would be something like a crypto race. 02:15.740 --> 02:20.240 In this case let's just say we've got a hard drive that's completely encrypted. 02:20.300 --> 02:26.030 If we destroy the keys for that drive we are no longer able to access that data. 02:26.030 --> 02:30.290 In essence we have purged the drive because it's completely useless. 02:30.290 --> 02:37.040 Now granted we could wipe it but you have no access to the drive and the data is in essence destroyed 02:37.040 --> 02:39.150 because it's not recoverable. 02:39.170 --> 02:42.970 The last one and the most fun one is destroy. 02:43.320 --> 02:48.000 Oh maybe I wasn't thinking about that type of destruction. 02:48.080 --> 02:54.020 Now with destroy what we're talking about is to actually ruin the media in such a way that it is no 02:54.020 --> 02:55.420 longer functional. 02:55.520 --> 02:58.570 So probably this is thing to be careful about. 02:58.580 --> 03:06.170 On the security plus and that is when we're talking about data destruction don't forget that life is 03:06.170 --> 03:07.900 more than hard drives. 03:08.150 --> 03:13.430 You can have paper media you can have tape media floppy disks. 03:13.430 --> 03:18.120 So they think about all these things which may be dated but it's on the exam. 03:18.140 --> 03:21.200 So when we're talking about destroying number one is burning. 03:21.200 --> 03:22.190 That's right. 03:22.190 --> 03:26.250 You can take paper and you can put your Bic lighter on there and burn it up. 03:26.270 --> 03:27.910 That is a great way to destroy it. 03:27.920 --> 03:33.410 And the media's completely ruined from that point on unless you can write on the ashes second. 03:33.430 --> 03:39.370 And this is also with paper and that is pulping pulping simply means to take whatever paper you have 03:39.610 --> 03:45.840 and soak it in water and grind it up a little bit turn it in a mush and it's absolutely useless. 03:46.180 --> 03:51.040 But for most people when we're talking about destroying media we're talking about something a little 03:51.040 --> 03:54.560 bit more exciting for example. 03:54.580 --> 03:59.470 This is a shredded hard drive. 03:59.470 --> 04:05.530 This has been run through a machine in such a way that it simply tears it apart shreds it into these 04:05.530 --> 04:10.670 little very sharp little pieces that no one is ever going to be able to use. 04:11.380 --> 04:16.870 The one level down from shredding is pulverising with pulverising. 04:16.900 --> 04:21.970 We have another kind of machine that doesn't just shredded into pieces but actually grinds it down into 04:21.970 --> 04:25.060 little teeny tiny individual pieces. 04:25.060 --> 04:29.640 Trust me when you're talking about shredding or pulverising I'm pretty sure I agree. 04:29.770 --> 04:35.220 We're never going to be able to use these devices again 04:35.470 --> 04:51.300 in.