Exact(15)
Systems protected by passwords are unlocked by something you know (the password), which others can find out.
Antivirus-software companies frequently post virus-definition updates on their Web sites so that registered users can keep their systems protected against current threats.
Absent methods of accessing systems protected by strong encryption, Obama asked a few weeks ago, "What mechanisms do we have to even do things like tax enforcement?
But systems protected by biometrics can be unlocked only by a bodily characteristic (such as a fingerprint) that no one can take from you.
Systems protected by keys or their high-tech equivalents, smart cards, are unlocked by something you have (the key), which others can steal.
Almost every expert can share stories of critical computer systems protected by woefully weak passwords: a child's name, a wedding anniversary, a spouse's birthday or other information stored within the vast databases of information available to anyone with a computer.
Similar(45)
In vertebrates, two immune systems protect against infection.
Just as robust health protects individuals, robust health systems protect everyone.
Quick braking systems protect pedestrians, so there is no need for sidewalks, lanes or signals.
Active systems protect an area with some sort of motion detector.
Interlock Systems protect ITER from potentially damaging operating off-normal conditions.
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