1 00:00:00,270 --> 00:00:04,670 Welcome to this module which talks about the trends that are reshaping the world of computer systems 2 00:00:04,670 --> 00:00:10,750 security in this module will try to provide answers to two questions. 3 00:00:12,330 --> 00:00:19,780 How we changed and why are we more susceptible to different types of attacks and how have attackers 4 00:00:19,780 --> 00:00:21,950 changed and what's motivating them now. 5 00:00:24,400 --> 00:00:28,530 The first catalyst for change is the birth of the new technological society. 6 00:00:29,710 --> 00:00:32,250 The Internet or to be more precise. 7 00:00:32,290 --> 00:00:39,970 Social networking services have significantly changed the lifestyles of many people this shift can easily 8 00:00:39,970 --> 00:00:48,660 be observed humans as social beings have throughout history visited and interacted with their neighbors 9 00:00:49,590 --> 00:00:51,460 friends colleagues and so on. 10 00:00:54,150 --> 00:00:56,790 Information was exchanged within small groups 11 00:00:59,630 --> 00:01:03,120 these communities were made up of members that knew each other fairly well. 12 00:01:05,040 --> 00:01:11,680 Knew about each other's lives and had a relationship of conditioned trust this trust is similar to a 13 00:01:11,680 --> 00:01:17,170 situation where you're likely to trust a person that's lived next to you for 15 years enough to ask 14 00:01:17,170 --> 00:01:23,170 them to care for your house while you are away social networking services brought about a change in 15 00:01:23,170 --> 00:01:24,640 the way humans behave. 16 00:01:28,960 --> 00:01:35,980 Why do some people talk of the Facebook era if Facebook were a country with over a billion users. 17 00:01:36,940 --> 00:01:39,610 It would be the third most populated in the world. 18 00:01:40,260 --> 00:01:43,620 Just behind China and India. 19 00:01:43,860 --> 00:01:47,540 Also the number of Facebook users has risen very rapidly. 20 00:01:49,320 --> 00:01:52,800 The popularity of the service makes it unlike anything else. 21 00:01:52,800 --> 00:02:01,690 Speaking historically and globally radio which was also a revolutionary invention needed half a century 22 00:02:01,690 --> 00:02:03,270 to get to 50 million users 23 00:02:07,750 --> 00:02:15,790 do of course the world's population was much smaller than television which was also revolutionary needed 24 00:02:15,850 --> 00:02:19,630 13 years to reach 50 million users. 25 00:02:19,640 --> 00:02:23,470 It took Facebook just a year to get to 200 million users. 26 00:02:24,830 --> 00:02:27,220 This suggests a major change in our lifestyle. 27 00:02:28,680 --> 00:02:31,780 Why is this topic relevant to computer systems security. 28 00:02:33,410 --> 00:02:38,380 One of the features Facebook offers is collecting friends. 29 00:02:38,440 --> 00:02:45,260 The average number of friends on Facebook has 150 especially in the younger demographic where there's 30 00:02:45,280 --> 00:02:48,310 a large group of people who have over 500 friends. 31 00:02:50,800 --> 00:02:56,050 I can't even imagine how you could socially interact like you interact with your neighbors or friends 32 00:02:56,050 --> 00:02:57,010 from work. 33 00:02:57,010 --> 00:03:04,050 With this many people either I'm the only person who can't do it or it's simply impossible. 34 00:03:05,430 --> 00:03:08,510 It could also be that the definition of friend has changed. 35 00:03:10,380 --> 00:03:12,780 A friend is no longer someone you can trust. 36 00:03:14,460 --> 00:03:17,470 It's someone you want to attach your profile with to make you look good. 37 00:03:18,290 --> 00:03:20,610 This is how we create our Internet brand. 38 00:03:22,480 --> 00:03:27,640 Whether it's moral to do so is beyond the scope of this discussion. 39 00:03:27,750 --> 00:03:34,020 It's relevant however that all friends we pick up on the Internet have access to a lot of our personal 40 00:03:34,020 --> 00:03:34,980 information. 41 00:03:37,520 --> 00:03:40,970 This is the information we publish ourselves on social media profiles.