Who-Fi: The Wi-Fi Tech That Can See Through Walls, Raising Privacy Fears

Tech News: Wi-Fi technology has taken a major leap with the introduction of a new system called Who-Fi — and it’s already raising serious privacy concerns. This breakthrough technology can track anyone with remarkable precision. Imagine changing clothes in your room or engaging in a private activity — Who-Fi can monitor every movement without needing a camera.

Although this technology is not yet available for public use, research papers reveal that it can turn ordinary Wi-Fi signals into a biometric scanner. It’s capable of not only detecting someone’s movement but also verifying biometric identity.

What is Who-Fi technology?

Who-Fi is a revolutionary system that uses Wi-Fi signals — without the need for cameras — to track people. It relies heavily on AI (Artificial Intelligence) to function. Reports say the system uses 2.4GHz Wi-Fi signals. It reads ‘channel state information’ with the help of a transformer-based neural network, which helps analyze the strength of Wi-Fi signals and detect changes in their path.

In simple terms, it spreads a web of Wi-Fi signals across a room. When a person moves or performs an activity, Who-Fi detects those disruptions and tracks the movements accurately.

How accurate is Who-Fi?

• The system is highly precise.
• If someone enters the signal range after a long time, Who-Fi can still recognize them.
• It can even read sign language movements.
• It works with just one transmitter antenna and three receiver antennas.
• It can detect a person walking behind a wall with 95% accuracy.
• It can track up to nine people at the same time.

Hard to detect

One of the most striking aspects of Who-Fi is that it is virtually undetectable. Devices that are designed to find surveillance equipment cannot pick up Who-Fi. This system functions by turning regular Wi-Fi signals into a powerful surveillance tool— and that’s why it’s creating growing fears about privacy across the globe. Experts warn that while Who-Fi has potential uses in security, healthcare, and smart home systems, it also poses serious ethical and privacy challenges. If misused, it could enable constant surveillance without consent, making it harder for people to maintain personal boundaries. Tech analysts believe governments and regulators will need to set strict guidelines before the technology becomes mainstream.