Cryptography
From Mathsreach
 About Ben Martin
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8m41s
Ben Martin could teach the da Vinci coders a thing or two. He's interested In cryptography, the study of secret codes. In this video he tells us a little bit about its history (the Romans were into it way back in Julius Caesar's day). Ben also talks about the everyday uses for cryptography, including cash machines and online Internet transactions with credit cards.
