Talk about ingenious! Shrinking down keypad locks to molecular scale would be a great way to secure valuables, especially in a safe! Unfortunately, if you are a thief, you may not enjoy hearing about this.
(Israel 21st Century) The molecular keypad lock, the first of its kind, was developed by scientists at the Weizmann Institute of Science in Rehovot. It operates similarly to the electronic locks on today's ATM machines, but uses a molecule in place of electrical circuits. [...]
[R]ather than the electric pulses of an electronic keypad, they consist of iron ions, acids, bases, and ultraviolet light. Shanzer's latest research on the molecular keypad was published in the Journal of the American Chemical Society (JACS) in December.
The only bad thing about this lock is that it takes nine minuets to open (not very convienent if you are in a hurry). But if perfected, these locks could be used to secure all kinds of governmental, corporate or personal data/items of high value.
If only they could make something similar for computers, then my life would be almost complete (geek wise, that is).
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