I have no idea which is more secure, and it would be pointless to speculate without the benefit of knowledge regarding the 3 systems, sony's recent trouble was caused by them deciding that they wouldn't let some douchebag hack the ps3, so that they basically could play pirated games on it, and post how to do it online, so they sued him which meant that hackers decided that they wouldn't stand for it and started what i like to call the "fuck sony" bandwagon which people have since jumped on and have found holes in sony's security. since the others have not had a hacker-based jihad put on them ,for doing something that they are perfectly entitled to do, it is impossible to tell if the others have similar security issues, but i suspect that they do.