....For the first time they were able to "read" participants intentions out of their brain activity by combination of functional magnetic resonance imaging and computer algorithms. By imaging patterns of activity in the brain's prefrontal cortex as subjects concentrated on their choice of two future actions, researchers have been able to distinguish cortical activity patterns that correspond to the subjects' different plans.Breakthrough in quest for mindreading - gizmag Article
This is A bit like we use to make cheats for games on the commodore 64. (people probably still do it this way) When we compare memory dumps to can find the ammo counter. After some trial and error you can find the address where this value is stored, changing it is easy. The next thing is finding what sets this value and changing that.
Soon we can secure your security by monitoring your thoughts. Doesn't that make you all warm and fuzzy inside?