protection

Hey guys, wondering if anyone can help me out with this.. I needa know if there is any way to protect work done in photoshop so that it cannot be altered. Whether it be by password or whatever. Any way that I can protect my work so it can't be altered without it being a real pain in the...

http://www.youtube.com/watch?v=_oZGYb92isE&eurl= yep they both use the same protection, they said flat out "it is unbreakable" but it has been broken already, rejoice!