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Now, as I promised you, 2

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this course is going to be highly practical. 3

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But I also promised that I will not neglect the theory. 4

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Now, what we mean by hacking 5

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is being able to gain access to a system 6

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that you're not supposed to have access to. 7

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So for example, logging into an email account 8

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that you're not supposed to have access to 9

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is considered hacking that account. 10

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Gaining access to a remote computer 11

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that you're not supposed to have access to 12

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is hacking that computer. 13

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Reading information that you're not supposed 14

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to be able to read, again, is considered hacking. 15

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So you can see that there is a large number of ways 16

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to hack into a system, and the word hacking 17

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can refer to a number of things, 18

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but the main concept is the same, 19

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gaining access or being able to do things 20

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that you're not supposed to be able to do 21

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is considered hacking. 22

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Now, there are three main types of hackers. 23

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We have the black-hat hackers, 24

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these are the bad people that hack systems illegally 25

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in order to steal money, 26

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or to achieve their own illegal goals. 27

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The second part of hackers are the white-hat hackers. 28

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So this is us, these people use the same techniques 29

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used by the black-hat hackers, 30

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and they also hack into systems. 31

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But they only hack into systems 32

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that they have permission to hack 33

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in order to test the security of the systems. 34

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And finally, we have the gray-hat hackers. 35

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These are a mixture of the two, 36

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so they'll hack into any system, 37

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even if they don't have permission 38

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to test the security of the system. 39

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But they will never steal money or damage that system, 40

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and in most cases, they'll go ahead 41

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and tell the administrator of that system. 42

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But what they do is still illegal 43

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because they test the security of systems 44

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that they do not own, or do not have permission to test. 45

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Now, one big question that people always ask is why hacking? 46

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Why teach or learn hacking? 47

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Well, hacking is an existing industry, 48

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there are lots of job opportunities for ethical hackers, 49

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for people like us, who would go ahead 50

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and test the security of systems 51

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to make sure that these systems are secure 52

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and not vulnerable to black-hat hackers. 53

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There is actually a huge demand 54

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for ethical hackers these days 55

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because of the increased amount of hacking attacks. 56

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So we hear on the daily big systems 57

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and big companies are getting hacked. 58

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Not so long ago, Uber got hacked, 59

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and information of more than 56 million users were exposed. 60

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So companies like Uber, Facebook, and Google, 61

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they hire hackers in order to try 62

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and hack into their systems, 63

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and tell them where the weaknesses are 64

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so that they can fix it. 65

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They also have bug bounty programs 66

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where they literally ask all the hackers around the world 67

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to go ahead and try to hack into their websites 68

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and with their web applications, and if they could, 69

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they will pay them a bounty for the bugs that they find.