> ## Content Index > Fetch the complete content index at: https://www.obscurepatentdangers.com/llms.txt > Use this file to discover other available public pages before exploring further. # Can Wi-Fi Really See You Through Walls? - URL: https://www.obscurepatentdangers.com/can-wi-fi-really-see-you-through-walls/ - Published: 2026-09-01T13:29:51.000Z - Updated: 2026-10-11T15:32:46.000Z - Description: Your router can become a motion sensor. What research has demonstrated through walls, what Xfinity offers, and why household activity data matters. - Author: Jim D. Yes. Researchers have used radio signals to estimate human poses through walls, and consumer Wi-Fi equipment can already detect movement inside homes. The unsettling part is how much a network built to carry data can learn about the people around it. **CASE STATUS:** Built and used with people in research; commercial motion sensing available through Xfinity. Research pose estimation and Xfinity’s motion alerts are different capabilities. [How we assign status](https://www.obscurepatentdangers.com/methodology/). ## Your body changes the signal A router’s signals interact with the room and the people moving through it. Software can analyze those changes to detect activity. Xfinity’s [own explanation](https://www.xfinity.com/support/articles/wifi-motion-faqs?ref=obscurepatentdangers.com) describes sensing areas between compatible Wi-Fi equipment and selected connected devices. A television or smart speaker can become part of the sensing network. ![Illustration of wireless signals interacting with a person inside a room](https://storage.ghost.io/c/d2/5b/d25bbfac-3962-47fc-b147-c5d65e582f13/content/images/2026/09/G2_how_wifi_sensing_works-1.png) Concept illustration of Wi-Fi sensing. ## What has been demonstrated through walls? MIT’s [RF-Pose project](https://rfpose.csail.mit.edu/?ref=obscurepatentdangers.com), published in 2018, estimated two-dimensional human poses through walls using radio signals. Its researchers trained a neural network with camera-based supervision, then used wireless signals for pose estimation. This was a research system using radio-frequency hardware, not a feature shown to work on every home router. In a separate study, [DensePose From WiFi](https://arxiv.org/abs/2301.00250?ref=obscurepatentdangers.com), researchers estimated the dense poses of multiple people from Wi-Fi signals. That establishes another human-sensing capability under experimental conditions. It does not make the full capability a documented feature of Xfinity’s product. A wall can conceal you from a camera while leaving information available to a radio-based system. That changes what privacy inside a room can mean. ## What is already available in homes? [Xfinity’s WiFi Motion](https://www.xfinity.com/support/articles/wifi-motion?ref=obscurepatentdangers.com) detects movement using compatible gateways and connected devices. Comcast describes it as opt-in and says it does not capture images, video or audio. Its performance depends on the layout, materials and signal paths in a home. The company’s troubleshooting guidance even addresses unwanted alerts from neighboring units or shared walls. A network’s sensing area need not line up neatly with the boundary of the household controlling it. ## Your movements become records Comcast’s support page says information generated by WiFi Motion may have to be disclosed through lawful legal processes, including subpoenas and warrants. It also describes disclosures in certain proceedings or emergencies. Household motion data can therefore have an audience beyond the person who enabled the feature. In an [August 2026 response to The Verge](https://www.theverge.com/tech/982689/comcast-xfinity-wifi-motion-privacy-concerns-response?ref=obscurepatentdangers.com), Comcast said motion activity was stored in its cloud for up to seven days. The company said the data did not identify people and that it did not monitor customers’ motion activity in real time. Even a simple activity log can expose a routine. An account holder’s decision to enable sensing can also affect guests, housemates and anyone else moving through the covered space. The privacy concern begins with that imbalance of control, before a system can recognize a face or reconstruct a body. **Clarification, September 12, 2026:** This file now links directly to supporting sources and separates research pose estimation from commercial motion detection. Earlier wording and the image caption could blur those capabilities. Unlinked study statistics and a vendor deployment count have been removed pending source verification. *Hero and explanatory artwork are illustrations, not photographs of a deployment.* [Challenge a claim](https://www.obscurepatentdangers.com/corrections/) · [Submit a related file](https://www.obscurepatentdangers.com/contact-us-tips/) Related file: [Amazon’s patents to track and direct workers’ hands](https://www.obscurepatentdangers.com/amazon-wristband-patents-worker-hand-tracking/) show another proposed use of wireless location sensing. Those grants expired in 2022, and deployment of the patented systems remains unverified. [Subscribe free](https://www.obscurepatentdangers.com/#/portal/signup) for more source-checked case files.