I agree that it's a bad idea to use non-cryptographic PRNGs as defaults. I think most people are not aware of how easy it is to break them. For fun, I wrote an

I agree that it's a bad idea to use non-cryptographic PRNGs as defaults. I think most people are not aware of how easy it is to break them. For fun, I wrote an Android app to break LCGs and Mersenne Twisters: https://github.com/asnelt/derandom https://github.com/asnelt/derandom