TITLE: READING 7: NUMBERED ANSWERS ON HEADED PAPER

http://www.dailymail.co.uk/sciencetech/article-2100566/Scientists-create-security-recognises-users-heartbeats.html

1.-What does this security system consist of?

2.-Is it reliable? Why? (explain)

3.-Which other system is Microsoft trying? Explain

4.-Which biometric system failed? Why? (explain)