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How fingerprint readers work You register your fingerprint using the built in reader and it saves it as your password. Next time you go to login you choose your username, swipe your finger and the PC verifies it against the one you scanned last time. If it matches then the computer logs you in. What [...] The Random Class Most people wanting to generate random numbers in Java do something similar to the following: public static void main(String[] args) { This is perfectly fine for a simple dice rolling application where there isn’t going to [...] Yesterday you may have read my GPG Symmetric Encryption Guide. The last tip on that page was that you should setup GPG keys and publish them on a keyserver. I say this because publishing GPG keys allows you to encrypt things for anyone else who has published their GPG keys without contacting them and exchanging [...] I often come into a situation where I have to exchange some important confidential file with somebody who doesn’t have GPG keys setup. Explaining how to setup keys can be a pain, especially if you believe that the user will lose them or simply forget how to use them. There are all manner of propriety [...] You’ve probably heard of ATM fishing by now. If you haven’t you should have. It typically involves placing a card reading device that is designed to blend in perfectly with the ATM. Then a camera or other device is placed that records the PIN of the user as they type it. So effectively while the [...] |
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