Neurohacking: Is the Human Brain the New Attack Surface?

Cybersecurity has traditionally focused on protecting networks, devices, data, and identities. However, advances in neurotechnology are expanding the boundaries of security into an area we have never before encountered: the human mind.

Brain-Computer Interfaces (BCIs), artificial intelligence–powered signal decoding systems, and implantable neurotechnological devices are increasingly blurring the line between humans and machines. While this transformation represents a major medical and technological breakthrough, it may also signal the emergence of a new attack surface.

In a world that already struggles to secure IoT devices, medical systems, and cloud infrastructures, how will we ensure the security of brain signals tomorrow?

This question elevates neurotechnology from an ethical debate to a strategic security concern.

What Is Neurotechnology?

Neurotechnology refers to an interdisciplinary field that combines neuroscience and technology. It involves integrating the study of the nervous system with technological disciplines. One of the most prominent developments in this field today is Brain-Computer Interface (BCI) technology.

BCIs analyze brain signals to enable interaction with computers. In other words, this technology allows brain activity to be interpreted by machines, enabling individuals to communicate with computers using only their thoughts. For example, BCIs can help paralyzed individuals or those with motor impairments regain the ability to communicate.

Brain-Computer Interface

Brain-Machine Interfaces and Recent Developments

In this context, Neuralink, founded by Elon Musk, was established to develop implantable brain-machine interfaces. In one case, a brain chip implanted in a paralyzed patient enabled the individual to move a computer cursor and play chess.

Research also demonstrates that artificial intelligence can convert brain activity into text. For instance, the “Semantic Decoder” developed at the University of Texas at Austin translates neural activity into written language, potentially helping paralyzed individuals communicate. Zijiao Chen, a member of the research team, has stated that if successful, the system could help us understand what individuals with disabilities are thinking and may eventually eliminate the need for mobile phones as communication tools.

Neurohacking: A New Threat Domain?

However, alongside these technological advancements, serious concerns are emerging. The possibility of controlling brain activity, manipulating memories, altering skills, or even changing an individual’s emotional state raises profound security questions. As technology continues to evolve, malicious actors could theoretically target electrical brain signals—an act that may be described as “neurohacking.”

Neurohacking

From Neuromarketing to Mind Reading

In its early stages, brain-related technologies were often applied in relatively benign contexts such as sales, marketing, human resources, and team management. The concept of neuromarketing emerged to better understand consumer emotions and decision-making processes. Techniques such as functional magnetic resonance imaging (fMRI) and electroencephalography (EEG) were used to measure consumer responses to various stimuli and shape marketing strategies accordingly.

Over time, however, it became evident that research on brain activity held far greater potential than merely analyzing purchasing behavior.

Decoding Thoughts

Researchers at the University of Oregon demonstrated that imagined faces could be reconstructed on a screen using fMRI combined with artificial intelligence. These studies suggest that even mental imagery may be technologically extracted.

Similarly, experiments conducted at Carnegie Mellon University have developed systems capable of accurately predicting references to people, places, and events within complex sentences. Such developments indicate that not only simple thoughts, but also complex memories and imagined scenarios, may be decoded.

Crime, Freedom, and Privacy

Given these developments, could a person be detained based solely on the thought of committing a crime—even without taking action? In a social experiment involving 96 individuals about to be released from prison, brain imaging data was reportedly used to predict the likelihood of reoffending.

These findings underscore the importance of designing neurotechnologies in ways that protect individual privacy, autonomy, and fundamental freedoms.

A New Dimension of Security

Beyond enabling communication for paralyzed individuals or advancing medical science, could these technologies create a future in which individuals are judged based on their thoughts? From a cybersecurity perspective, could hackers infiltrate the human mind, steal personal information, or manipulate behavior?

How society chooses to govern and regulate these technologies will be one of the defining challenges of the future. In the 21st century, security may need to extend beyond digital systems to safeguard cognitive integrity itself. This shift may require redefining security to encompass not only technological infrastructure, but also the protection of the human mind.