Security at Your Fingertips

Fill the gaps with the right prepositions

I recently got a chance to act my spy dreams after I learned a new class of fingerprint security systems that can work your PC or laptop. These relatively inexpensive devices can protect your own top-secret electronic files recording your fingerprint - any finger or thumb will do - a small sensor attached by a USB line your computer. Thereafter anyone seeking to open the files must place a finger the sensor ; if the print does not match the recorded data, access is denied. Fingerprint authentication can also provide an extra level security when you're conducting transactions on the Internet. And the technology can stop hackers breaking corporate or government networks, because it's a lot harder to steal a finger than a password.