Casey Anthony -- Private Videos Were HACKED from My Computer

Casey Anthony claims the videos that leaked onto the Internet last week were stolen from her computer by a malicious hacker ... this according to her probation officer.

According to the Florida Department of Corrections, Casey made the claim during a recent meeting with her P.O. ... insisting someone illegally downloaded the clips off of her personal machine and then posted them on YouTube (below).

As we previously reported, the videos show Casey talking to herself about pretty mundane things -- adopting a dog, new piercings ... nothing that embarrassing ... but according to the docs, Casey's real pissed the videos were stolen.