Research is likely decades ahead of what is now publically available. The research is ongoing.
Here are 3 examples of the science showing how minds can be tapped into via technology.
1. Technology could read unspoken thoughts via larynx nerve signals (since 2007). (Think what this can do today, possibly without an attached implant or sensor, like the fMRI in #2 below).
Although some people claim their mouths operate independently of their brains that's not usually the case. The brain sends neurological signals to the larynx, which converts them into sound. Now, what if we could use those larynx nerve signals to control things?
That's exactly what a company called Ambient is doing. Its Audeo technology basically converts "unspoken speech" (neurological signals flowing through larynx nerves when a person thinks about speaking) into control commands that can be used to guide a motorized wheelchair (video above) or synthesize speech. Pretty amazing!
To use the system, a person wears a lightweight sensor band around the neck. The band picks up the larynx nerve signals and transmits them wirelessly to a remote computer (don't worry about "mind wiretapping" -- the transmission is encrypted.) The remote computer uses NI LabVIEW and signal processing algorithms to interpret the nerve-impulse patterns and translate them into the right commands.
2. The fMRI can suck that picture straight out of your brain. You don't need any sort of implant or anything. (This was touted back in 2012. Again, where is it today? one might wonder).
http://spectrum.ieee.org/automaton/robotics/artificial-intelligence/fmri-reads-thoughts-in-real-time-to-remotely-control-robotFunctional magnetic resonance imaging (fMRI) is a remarkable technology: it can be used to do everything from recording your dreams on video to teaching you new skills while you sleep. It's also good for controlling robots, and Israeli researchers have managed to get a robot to move around a room just by thinking about it.
An fMRI machine detects changes in blood flow to measure brain activity in real time with a very fine degree of spatial resolution. It can detect changes so subtle that it's possible to differentiate between the activity patterns created when you think about turning left versus when you think about turning right, which is the basis for the experiment shown in the video below. In Israel, a researcher inside an fMRI machine thinks "walk forward" or "move right" or "move left," and a thousand kilometers away in France, a robot performs the movement based on the researcher's thoughts alone while sending back first-person video for an avatar-like experience:
There are a few different reasons why this method of brain control is different from (and arguably better than) other methods of brain control that we've seen in the past. Other tools, like Emotiv's EPOC headset, can detect specific patterns of brainwaves that can then be used to send commands to a robot, but to get that to work, you have to train your brain to reliably create those brainwaves. fMRI, on the other hand, can (sort of) read your thoughts directly, with a vaguely alarming degree of accuracy, meaning that very little training is necessary: just picture a robot doing something, the fMRI will suck that picture straight out of your brain, and then get the robot to do the same thing. The other big advantage is that you don't need any sort of implant or anything, just a ridiculously expensive machine.
3. The fMRI is commonly combined with other biometric tracking techniques to provide a clear picture of the subject.
It is common to combine fMRI signal acquisition with tracking of participants' responses and reaction times. Physiological measures such heart rate, breathing, skin conductance (rate of sweating), and eye movements are sometimes captured simultaneously with fMRI. The method can also be combined with other brain-imaging techniques such as transcranial stimulation, direct cortical stimulation and, especially, EEG. The fMRI procedure can also be combined with near-infrared spectroscopy (NIRS) to have supplementary information about both oxyhemoglobin and deoxyhemoglobin.
The fMRI technique can complement or supplement other techniques because of its unique strengths and gaps. It can noninvasively record brain signals without risks of ionising radiation inherent in other scanning methods, such as CT or PET scans. It can also record signal from all regions of the brain, unlike EEG/MEG, which are biased toward the cortical surface... R
U Try searching biometrics or mind at the IEEE for more interesting developments.