WEBVTT 0 00:00.270 --> 00:02.360 Hi and welcome. 1 00:02.390 --> 00:03.110 now in this lecture. 2 00:03.110 --> 00:06.910 We're going to learn about different types of Wi-Fi protocols. 3 00:06.920 --> 00:09.890 There are three kinds of wireless security protocols out there. 4 00:09.890 --> 00:15.400 And those are WEP WPA and WPA2 . Wi-Fi 5 00:15.410 --> 00:21.260 Protocols are kind of logical to secure your Wi-Fi network but it is sometimes a bit puzzling to understand 6 00:21.350 --> 00:23.520 which encryption protocol to implement 7 00:23.570 --> 00:31.350 with all the acronyms. So now I will try to explain the difference among the encryption standard like WEP WPA 8 00:31.380 --> 00:38.840 etc. so you can understand which your work best Wi-Fi security algorithms have been through many 9 00:38.840 --> 00:45.380 changes and upgrade since the 1990s to become the more secure and effective different types of wireless 10 00:45.380 --> 00:51.100 security protocols were developed for homework wireless network protection. The wireless security protocol 11 00:51.100 --> 00:57.650 are WEP WPA and WPA2 serving the same purpose but being different at the same time. 12 00:57.650 --> 01:03.200 Not only do the protocols prevent unwanted parties from connecting to your wireless network but also 13 01:03.200 --> 01:07.380 wireless security protocols encrypt your private data sent over the airwaves. 14 01:07.820 --> 01:14.950 No matter how protected an encrypted wireless security cannot keep up in safety with wired network. The later 15 01:15.050 --> 01:21.500 at their most basic level transmit data between two points A and B connected by a network cable. 16 01:21.680 --> 01:28.580 To send data from A to B wireless network broadcasts it within their range in every direction to every 17 01:28.580 --> 01:31.250 connected device that happened to be listening. 18 01:31.250 --> 01:41.090 Okay let's have a closer look at WEP WPA and WPA2. wired equivalent privacy or WEP was developed for wireless 19 01:41.090 --> 01:49.160 networks and approved as a Wi-Fi secured standard in September 1999 WEP was aim to offer 20 01:49.160 --> 01:51.950 the same security level as a wired network do. 21 01:51.980 --> 01:58.340 However there are a bunch of well-known security issues in WEP which is also easy to break and hard 22 01:58.340 --> 01:59.320 to configure. 23 01:59.480 --> 02:06.140 Despite all the work that has been done to improve the WEP system that is still is a highly venerable 24 02:06.140 --> 02:07.870 solution. Systems 25 02:08.040 --> 02:13.910 that's really on these protocols should be either upgraded or replaced in case securely upgraded is 26 02:13.910 --> 02:15.120 not possible. 27 02:15.200 --> 02:24.500 WEP was officially abandoned by Wi-Fi Alliance in 2004 Wi-Fi protected access or WPA for the time 28 02:24.500 --> 02:29.270 the 802.11i wireless security standard was in development. 29 02:29.350 --> 02:36.680 WPA was used as a temporary security enhancement for WEP. One year before WEP was officially abandoned 30 02:36.770 --> 02:39.480 and WPA was formally adopted. 31 02:39.480 --> 02:48.650 Most modern WPA application use a Pre shared key or PSK most often referred to as WPA personal and the temporal 32 02:48.650 --> 02:56.690 key integrated protocol or TKIP for encryption. WPA enterprise use an authentication server for case 33 02:56.720 --> 03:04.070 and certificates generation WPA was a significant enforcement over WEP but as the core competence were 34 03:04.070 --> 03:11.240 made so they could be rolled out through firmware upgrades on WEP Enable devices they steal relayed on to exploited 35 03:11.240 --> 03:18.560 element WPA just like WEP after being put through proof of concept and applied public demonstration 36 03:18.650 --> 03:24.590 turned out to be pretty vulnerable intrusion the attacks that post the most treated to the protocol 37 03:24.590 --> 03:31.490 ware however not the direct ones but those that are made on Wi-Fi protected set-up or WPS. 38 03:32.140 --> 03:37.820 Auxiliary system developed to simplify the linking of the device to Modern access point. Now 39 03:37.880 --> 03:44.890 Wi-Fi protected access version 2 or WPA2. The 802.11i wireless security standard 40 03:44.890 --> 03:48.440 based protocol was introduced in 2004. 41 03:48.440 --> 03:54.470 The most important improvement of WPA2 over WPA was use of the advanced encryption standard 42 03:54.530 --> 04:02.030 or AES for encryption AES is approved by the US government for encrypting the information classified 43 04:02.150 --> 04:08.810 as top secret. So it must be good enough to protect home network. At this time the main vulnerability 44 04:08.840 --> 04:15.320 to a WPA2 system is when the attacker already has access to a secure Wi-Fi network and can 45 04:15.320 --> 04:20.540 gain access to certain key to perform an attack on the other devices on the network. 46 04:20.540 --> 04:26.900 This being said the security suggestion for the known WPA2 vulnerability are mostly significant 47 04:26.900 --> 04:32.440 to their networks of enterprise level and not really relevant for small home networks. 48 04:32.450 --> 04:39.110 Unfortunately the possibility of the attacks via the Wi-Fi Protected setup WPS is still high the 49 04:39.140 --> 04:46.860 current WPA2 capable access point which is the issue with WPA also and even to breaking into a WPA 50 04:46.900 --> 04:53.810 WPA2 secured network through these whole will take anywhere around 2 hours to 14 hours. 51 04:54.110 --> 05:00.140 And it is still a real security issue and WPA should be visible and it would be good if the access 52 05:00.140 --> 05:07.280 point firmware could be reset to distribution not supporting WPS to entirely execute this attack 53 05:07.280 --> 05:08.270 Vector. 54 05:08.270 --> 05:15.080 Now theWi-Fi protected setup or WPS. Wi-Fi protected setup is a network security slandered to create 55 05:15.080 --> 05:18.410 a secure wireless home network. 56 05:18.460 --> 05:24.670 The goal of the protocol is to allow home users who know little of wireless security and may be intimidated 57 05:24.700 --> 05:30.460 by the available security options to setup Wi-Fi protected access. As well as making it is easy 58 05:30.460 --> 05:36.400 to add a new device to existing network without entreating a long past presses. A major security flaw 59 05:36.400 --> 05:43.270 was relived in December 2011 that effects wireless routers with the WPS pin features which most recent 60 05:43.270 --> 05:45.370 models have been enable by default. 61 05:45.430 --> 05:51.610 The flaw allows a remote attacker to recover the WPS pin in a few hours with a brute-force attack. 62 05:51.620 --> 05:58.930 The users have been urged to turn off the WPS pin features although this not be possible on some router models. 63 05:58.930 --> 06:00.350 So what do you think. 64 06:00.430 --> 06:02.790 What is the best protocol forWi-Fi security. 65 06:02.800 --> 06:06.280 I hope you understand which protocol work best for Wi-Fi security. 66 06:06.430 --> 06:07.820 That's all for this lecture. 67 06:07.870 --> 06:09.100 So seeing the next one. Bye.