![\"Comcast](\"https:\/\/thelibertydaily.com\/wp-content\/uploads\/2026\/08\/comcast-wifi-motion-sensor.jpg\")
<\/figure>\n\n\n\nBy Tyler Durden<\/p>\n\n\n\n
(ZeroHedge<\/a>)\u2014Dear Comcast customers:<\/strong> The internet gateway in your living room is now a motion sensor. It\u2019s free of charge, and the data can go to law enforcement without further notice<\/strong>. What\u2019s more, researchers have already shown<\/a> that these same signals can identify exactly who is in the room<\/strong>.<\/p>\n\n\n\n On Tuesday, Comcast unveiled Xfinity Shield<\/a>, a home security platform built entirely around the WiFi network. Its centerpiece, WiFi Motion, turns the leased gateway into a motion detector at no extra charge.<\/strong> According to Comcast, a typical customer has roughly 36 devices connected to their WiFi.<\/p>\n\n\n\n WiFi Motion works because a human body moving through a room disturbs the signal field between the gateway and stationary connected devices, like a printer or a game console. While the feature is opt-in and \u2013 according to Comcast\u2019s rollout materials \u2013 does not track phones or reach through WiFi extenders, those limitations are choices Comcast made in software, not limitations of the technology itself<\/strong>.<\/p>\n\n\n\n Comcast says WiFi Motion works \u201cwithout recording video, capturing images or identifying individuals.\u201d<\/p>\n\n\n\n The company is not shy about identification as a product. The $15-a-month tier, Xfinity Shield Select, adds AI-powered cameras that identify people, pets, packages and vehicles.<\/strong> The free tier\u2019s restraint is a line drawn one product SKU away.<\/p>\n\n\n\n The company\u2019s own terms spell out where the data can go. According to the fine print<\/a> that drew criticism when the feature first appeared last year, Comcast \u201cmay disclose information generated by your WiFi Motion to third parties without further notice\u201d<\/strong> in connection with law enforcement investigations. Users pointed out at the time that the only complete opt-out is returning the Xfinity router.<\/p>\n\n\n\n The true capabilities of this technology were laid out by researchers at Germany\u2019s Karlsruhe Institute of Technology (KIT) in findings presented last November at the ACM Conference on Computer and Communications Security in Taipei. Using nothing but the traffic from an ordinary WiFi network, their system identified people with 99.5 percent<\/a> accuracy<\/strong> in a study of 197 participants, regardless of viewing angle or how the person walked.<\/p>\n\n\n\n The method exploits beamforming feedback information (BFI) \u2013 housekeeping signals that every connected device sends back to the router so it can aim its transmissions efficiently. Beamforming has shipped with consumer WiFi hardware since WiFi 5. Because this feedback travels unencrypted, anyone within radio range can read it and, using a trained model, convert it into a crude radio image of whoever is present.<\/p>\n\n\n\n The person being identified does not need to be carrying a device at al<\/strong>l; it is enough that other people\u2019s nearby phones and laptops are talking to the router. \u201cThis technology turns every router into a potential means for surveillance,\u201d KIT\u2019s Julian Todt warned. He described a scenario in which someone who regularly walks past a caf\u00e9 running a WiFi network could be recognized there later \u2013 by authorities or companies \u2013 without ever knowing it happened.<\/p>\n\n\n\n One limitation provides a reality check: the system works only after it has been trained on a person\u2019s radio signature<\/strong>. The 99.5 percent accuracy figure applies to re-identifying enrolled participants, not identifying a stranger cold. The attack succeeds when it can say \u2018the person recorded here is the person recorded earlier\u2019. So this limitation disappears once anyone with sufficient reach starts collecting signatures at scale.<\/p>\n\n\n\n The standards process has already moved past the warning stage<\/strong>. In 2025, the IEEE ratified 802.11bf, an amendment that deliberately builds sensing capabilities into WiFi \u2013 such as presence detection, fall detection, and breathing monitoring \u2013 and early implementations are already appearing in silicon. While the KIT team is urging for privacy safeguards in that new standard, the technique they demonstrated needs none of it: it runs entirely on beamforming features that have been deployed in consumer routers for over a decade<\/strong>.<\/p>\n\n\n\n The researchers tested mitigations. Cutting the frequency of beamforming reports barely dented accuracy even at heavily degraded sample rates, and encrypting the feedback would require rewriting the WiFi standard and breaking backward compatibility with billions of deployed devices.<\/p>\n\n\n\n Meanwhile, the visible surveillance layer is in open retreat in America<\/strong>. Flock Safety, the license plate reader network that became the flashpoint of this year\u2019s anti-surveillance backlash, spent last week announcing guardrails<\/a> \u2013 cutting default data retention from 30 days to seven, and instituting automatic lockouts for abnormal searches. The company\u2019s own justification undercuts the gesture: Flock says more than 90 percent of searches are completed within a week anyway.<\/strong> This comes after a summer of reports of misuse<\/a>, more than 50 agencies and jurisdictions walking away<\/a> from contracts since January, and people in multiple states destroying<\/a> the cameras outright. The ACLU called the changes a \u201cthinly veiled PR attempt<\/a>\u201d built on \u201clargely hollow security promises.\u201d<\/p>\n\n\n\n A camera is at least a visible object: it sits on a pole, neighbors notice it, city councils vote on it, and when enough people get angry, it comes down. Flock needed a decade and roughly 120,000 cameras to cover American roads. The WiFi build-out was finished years ago<\/strong> \u2013 one living room, caf\u00e9, and office at a time \u2013 and there is nothing on a pole to point at.<\/p>\n","protected":false},"excerpt":{"rendered":" Confirmation that they’re ready with the firmware changes to enable WiFi tracking. Thought it’s opt-in for now. And why you run your own gear where you control the firmware and not what your ISP controls. And perhaps the move to opensource firmware is going to become a requirement. https:\/\/thelibertydaily.com\/comcast-turns-millions-routers-motion-sensors-same-wifi\/ By Tyler Durden (ZeroHedge)\u2014Dear Comcast customers: […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-18490","post","type-post","status-publish","format-standard","hentry","category-tech"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":7}},"featured_image_src":null,"author_info":{"display_name":"Jason","author_link":"https:\/\/jasonsblog.ddns.net\/index.php\/author\/jturning\/"},"_links":{"self":[{"href":"https:\/\/jasonsblog.ddns.net\/index.php\/wp-json\/wp\/v2\/posts\/18490","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jasonsblog.ddns.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jasonsblog.ddns.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jasonsblog.ddns.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jasonsblog.ddns.net\/index.php\/wp-json\/wp\/v2\/comments?post=18490"}],"version-history":[{"count":1,"href":"https:\/\/jasonsblog.ddns.net\/index.php\/wp-json\/wp\/v2\/posts\/18490\/revisions"}],"predecessor-version":[{"id":18491,"href":"https:\/\/jasonsblog.ddns.net\/index.php\/wp-json\/wp\/v2\/posts\/18490\/revisions\/18491"}],"wp:attachment":[{"href":"https:\/\/jasonsblog.ddns.net\/index.php\/wp-json\/wp\/v2\/media?parent=18490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jasonsblog.ddns.net\/index.php\/wp-json\/wp\/v2\/categories?post=18490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jasonsblog.ddns.net\/index.php\/wp-json\/wp\/v2\/tags?post=18490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}