1
00:00:00,240 --> 00:00:01,020
Hi, everyone.

2
00:00:01,320 --> 00:00:07,050
In this lecture, we are going to see what is WBB, which is the white equivalent priority.

3
00:00:07,440 --> 00:00:12,120
So as we all know that it is the oldest one and it can be easily broken.

4
00:00:12,750 --> 00:00:18,600
So WSP uses algorithm called Oddisee for encryption, which as you can see here.

5
00:00:21,130 --> 00:00:29,110
OK, so in this algorithm, each packet is encrypted at the router or access point and then sent out

6
00:00:29,110 --> 00:00:29,840
into the air.

7
00:00:30,550 --> 00:00:36,910
So what the client receives this packet, the client will be able to transform its back to its original

8
00:00:36,910 --> 00:00:39,220
form because it has the key.

9
00:00:39,700 --> 00:00:46,600
So in other words, we can see that the router includes the packets and send it and the client receives

10
00:00:46,600 --> 00:00:48,080
the packet and decrypted.

11
00:00:48,520 --> 00:00:52,170
So the same happens if the client sent something to the router.

12
00:00:52,660 --> 00:00:59,680
So it will first encrypt the packet using a key and send it to the router and the router will be able

13
00:00:59,680 --> 00:01:02,170
to decrypt it because it has the key.

14
00:01:02,830 --> 00:01:09,000
So in this process, if a hacker captures the packet in the middle, then they will get the packet,

15
00:01:09,010 --> 00:01:14,240
but they would not be able to see the content of the packet because they do not have the key.

16
00:01:15,550 --> 00:01:20,130
So each packet that is sent into the air has a unique stream.

17
00:01:20,800 --> 00:01:30,310
So the unique stream is generated using 24 bit initialization vector, which, as you can see, is 24

18
00:01:30,310 --> 00:01:31,490
Bedivere BlueSky.

19
00:01:32,080 --> 00:01:40,180
OK, so an initialization vector is a random number that is sent into each packet in a plain text form,

20
00:01:40,870 --> 00:01:42,240
which is not encrypted.

21
00:01:42,760 --> 00:01:49,750
So if someone captures the packet, they will not be able to read the packet content because it is encrypted.

22
00:01:50,110 --> 00:01:51,310
But they can read the.

23
00:01:52,840 --> 00:01:58,640
What did this ivy in the plane text bomb, because it is not encrypted.

24
00:01:59,090 --> 00:02:05,020
OK, is this clear which as you can see here, we are having this key, which is I.V. and it is going

25
00:02:05,020 --> 00:02:06,320
in plain text.

26
00:02:06,660 --> 00:02:14,500
OK, so the weakness with the I.V. is that it is sent in a plain text and it is very solid, which is

27
00:02:14,500 --> 00:02:15,890
only 24 bed.

28
00:02:16,510 --> 00:02:21,320
So in a busy network, there will be a large number of packets sent in the air.

29
00:02:22,000 --> 00:02:26,070
So at this time, 24, but no, it's not big enough.

30
00:02:27,100 --> 00:02:34,750
So the I.V. will start repeating on a busy network so the repeated IVs can be used to determine the

31
00:02:34,750 --> 00:02:35,560
key stream.

32
00:02:35,920 --> 00:02:43,450
So this makes an WSP vulnerable to statistical attack so determined simply in order to determine the

33
00:02:43,450 --> 00:02:46,970
key stream, we can use a tool called aircraft.

34
00:02:47,560 --> 00:02:50,280
So this tool is used to determine the key stream.

35
00:02:50,680 --> 00:02:58,090
So once we have enough repeated Ivey's, then it will also be able to crack WSP and give us the key

36
00:02:58,090 --> 00:03:01,750
to the network, which we are going to see very soon in this section.

37
00:03:02,380 --> 00:03:07,570
So this is all about how WSP folks and what it is.