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Submission + - Researchers identify people through ordinary Wi-Fi with 99 percent-accuracy (tomshardware.com)

Submitted by Baron_Yam
Baron_Yam writes: Security researchers at the Karlsruhe Institute of Technology (KIT) in Germany have published a paper demonstrating that unencrypted beamforming data broadcast by Wi-Fi devices during normal operation can be used to identify individuals walking through a room with 99.5% accuracy, regardless of whether the individuals are carrying Wi-Fi devices. The tactic leverages the router's beamforming tech to identify individuals with up to 99.5% accuracy, and it works with existing routers, too.

The system, called BFId, requires no specialized hardware, no access to the target Wi-Fi network, and works even if the person being tracked isn't carrying a wireless device. The team tested the attack on 197 participants, the largest dataset ever used in Wi-Fi-based identification works, and plans to present its findings at the ACM Conference on Computer and Communications Security (CCS) in Taipei.

See GitHub — https://github.com/ruvnet/RuVi... — for your own personal implementation requiring a couple of APs and a couple of ESP32 nodes. You can get full-home per-zone motion and occupancy detection fairly reliably, with the potential for pose detection and in optimal areas even respiration rate. With the right hardware and configuration, you can theoretically get heart rate too.

Comment I have been testing FreeBSD 15.1 on my extra PC (Score 1) 66

I used to run the BSD's all the time in the old days and use them for servers, firewalls, but for the last decade or more its been Linux only for me.

I have been running a KDE desktop lately using FreeBSD 15.1 Beta for a few weeks on my extra PC and using it for some stuff, and its been surprisingly nice, even with Wayland.

And the "boot environments" stuff with ZFS snapshots, makes it very nice and easy to have automatic bootable snapshots, and provides pretty much the same functionality as btrfs+snapper+grub.

My main daily driver desktop PC is Linux, but so far it seems to me that if you don't need gaming, FreeBSD is not a bad desktop OS at all.

Comment Dumped Grok over this (Score -1) 72

Grok was constantly say it was doing something that it had ZERO ability to, and I kept calling it out and it kept apologizing and then immediately doing it again.

As a guy who spend 5 figures a year on Ai, the last thing I want is that. I know Claude and ChatGPT also do it, but Grok was doing it CONSTANTLY.

Comment "bright as a full moon" (Score 3, Insightful) 80

by Speare (#66032886) Attached to: Startup Wants To Launch a Space Mirror

You can stare at the full moon all night if you like, because the albedo of the moon has filtered most of the light including the UV band that naturally passes through our own atmosphere. The three mile circle illuminated by a mirror would bounce a significantly higher amount of UV than the moon's albedo. If you treat the 60ft reflector as an analog to a pinhole in a pinhole camera, the circular area on the Earth surface would be a rough projection of the image of the sun.

(1) I wonder how they calculate the UV exposure for the observer on the surface within the illumination area.

(2) I wonder if you'd be able to detect places in a coherent projection where sunspots or coronal ejections are reflected through the "pinhole" effect of this arrangement.

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Of course you can't flap your arms and fly to the moon. After a while you'd run out of air to push against.

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