Interesting. The problem is NO MATTER WHAT, people don't trust computers for truly random numbers. Even if it truly is. They'll think your computer is defective. Hacked or somehow altered after the fact. For small lotteries your method is fine. For bigger ones I don't think you'll find any lottery worth a lot of money using computers for the numbers. They all use some type of balls in a dome or some type of physical device. People trust those. They understand it better why you can't manipulate it. Computer randomness is beyond most people. Since they don't get it, they don't trust it. That's pretty much why I eventually just decided to use "real world" lottery numbers into mine. WAY easier to explain why it's impossible to manipulate the outcome.