Do you feel nervous when you make a credit-card transaction using your mobile phone? Your worries could soon be a thing of the past, thanks to a low-cost device that could bring powerful cryptography ...

How to Make Random Images Appear in Java. The Java "Random" class lets you generate a random number for your Java apps. You use this number generator to randomize images shown in your apps.

Do you trust the passwords created by third-party software to be truly random and safe? Here's how to build your own random generator for uncrackable passwords.

Most password managers include a tool for generating random, strong passwords, but not all are created equal. Understanding the differences can help you make an informed choice.