On the other hand, there have been rather dramatic advances in brain / computer interfaces and using machine learning to interpret electrical signals from the human brain. The good news there is that every brain is different, the machines need to learn each brain individually (a model trained to pull dream images out of my brain will pull just gibberish out of yours).
So far, the researchers would need your close cooperation in order to train a machine to understand even a little bit of what's going on in your mind. This tech is nowhere near being used for interrogation.