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Video transcript

hi my name is Jenny Martin and I'm the director of cybersecurity investigations at Symantec today cybercrime causes huge problems for society personally financially and even in matters of national security just in the last few years hundreds of millions of credit card numbers have been stolen tens of millions of Social Security numbers and health care records were compromised even nuclear centrifuges that have been hacked and unmanned aerial drones have been hijacked this is all done by exploiting vulnerabilities in hardware and software or more often by taking advantage of unintentional decisions made by the people using the software people committing these cyber crimes don't fit a single profile or motivation it could be anyone from an international terrorist to a teenager competing for bragging rights today the largest countries not only have a regular army but also have a well-armed cyber army in fact the next world war may not be fought with traditional weapons but with computers used to shut down national water supplies energy grids and transportation symbols hi my name is Theresa and I'm Google security princess I've worked on a lot of different Google products in a lot of different ways to try and make our software as secure as possible now let's take a look at how cyber crime works under the hood we'll learn about software viruses denial of service attacks and phishing scams in biology and life a virus is an organism that is spread by coughing sneezing or physical contact viruses work by infecting cells injecting their genetic material and using those cells to replicate they can make people really sick and then spread to other people a computer virus works a bit similarly a virus is an executable program that gets installed usually unintentionally and harms a user and their computer it's also possible for a virus to spread itself to other computers now how does a virus get on your computer in the first place there are a couple ways an attacker to infect someone's computer they might lure a victim into installing a program with deception about the program's purpose so for example a lot of viruses are disguised as security updates it's also possible that the software on your computer has a vulnerability so an attacker can install itself without even needing explicit permission once a virus is on your computer it can steal or delete any of your files control other programs or even allow someone else to remotely control your computer using computer viruses hackers can take over millions of computers worldwide and then use them as a digital army otherwise known as a botnet to attack and take down websites this kind of attack is called a distributed denial of service a denial of service is when hackers overwhelm a website with too many requests we call it a distributed denial of service when the attack comes from many computers all at once most websites are ready to respond to millions of requests a day but if you hit them with billions or trillions of requests coming from different places the computers are overloaded and stop responding another trick used by cyber criminals is to send large amounts of spam email in an attempt to trick people into sharing sensitive personal information this is called a phishing scam a phishing scam is when you get what seems like a trustworthy email asking you to log into your account but clicking the email takes you to a fake website if you log in anyway you've been tricked into giving your password away hackers can then use your login credentials to access your real accounts to steal information or maybe even to steal your money fortunately there are many companies laws and government organizations working to make the internet safer but these efforts are not enough you may think when a computer system gets hacked the problem was the security design or the software 90% of the time a system gets hacked however it's not because of a security bug but because of a simple mistake made by a human it turns out there are steps we can all take to protect ourselves often reactions not only impact the security of your own data and computer but the security of everyone at your school workplace and home with billions or trillions of dollars at stake cyber criminals get smarter each year and we all need to keep you