To answer the question 20, consider the sentence below.When...

Instruction: Answer questions 19 to 23 based on the following text.

Want to stay safe on the Internet? It's time to rethink all your passwords.

1. asdasThat's what David Kennedy did. He's a security researcher and "ethical hacker," and he remembers only
2. one password: it unlocks a password vault, an encrypted database that stores dozens of his other
3. passwords. Each one ranges from 30 to 50 characters long. "Even if hackers got access, it's protected and
4. encrypted and keeps it in encrypted format," said Kennedy, who has the tech skills to crack passwords
5. easily.
6. asdasWeb security tools are increasingly in focus as people scramble to change their passwords after a
7. software bug called Heartbleed, which enabled security holes on sites thought to be secure. Along with
8. strong passwords and safe password storage, Kennedy also says 2-factor verification is a must for anyone
9. signing in to a website. With this process, you enter your regular password, but that triggers a text message
10. or a phone call with an additional code you must enter before signing on.
11. asdasRobert Hansen, Vice President of Labs, WhiteHat Security, advises people not to use the same
12. password for different websites. As a security researcher who ________ hacker communities, Hansen is
13. extreme when it comes to his own security. "When I close my browser, the cache and cookies are removed...
14. all third party cookies are removed," he said. "All ads are removed. All tracking systems are disabled."
15. asdasBoth Kennedy and Hansen agree: in an increasingly hackable web, passwords are antiquated. "We need
16. to move to different technologies that support something other than a password," Kennedy said. One
17. solution: biometrics. Apple's iPhone 5s and Samsung Galaxy S5 ________ a fingerprint scanner. Other
18. companies are also building out biometric technology. A company called Bionym recently created a
19. wristband that _________ a user's cardiac rhythm for authentication purposes.
20. asdasBut passwords aren't going anywhere any time soon, Kennedy said, and the impact of the Heartbleed
21. bug will be felt for a long time. "Heartbleed is probably one of the largest security exposures that we've ever
22. seen," he said. "It's a big deal and it's not going away soon."

(Source: Laurie Segall - http://money.cnn.com/2014/04/21/technology/hackers-heartbleed/index.html – Adapted)