A perfect random number generator

A lot of computer security folk spend their time trying to generate truly random numbers. Most random numbers in a computer are just a really complex math equation run multiple times. The results look random, but if you know the equation you can guess the next number by doing nothing more than running the equation again.

Random numbers are used all the time to generate keys to keep things secret. Obviously banks and other businesses can't have keys that people can easily guess by stealing an equation. Modern cryptographers have added all sorts of tricks to make their number more random. They can measure how fast you type and add it to how often you move the mouse and multiply that by the speed the CD-ROM is spinning. These add a lot of randomness, but none is truly random. Some companies have gone as far as using radioactive decay (a fundamentally random process) to avoid these problems.

I have a much simpler solution. Try adding the current NASDAQ or DOW to you random number. If the hacker manages to find a way to predict your random numbers now, steal his equation and use it to make millions because he just figured out how to predict the stock market! :)