Did you know that a 6 digit passcode takes less than 1 day to crack, while a 10 digit passcode can take several years? Just do not use a phone number, as this can be guessed easily. Nick Egbert joins us from Purdue University and is specializing in cryptography and number theory. He explains how simple and extremely complex codes work. Nick teaches us that everything from depositing a check using your phone, logins to any website, to reusing passwords, all use cryptography.