Collaborate Disseminate
In a world increasingly reliant on technology, a pressing question arises: can our dependence on gadgets, particularly mobile phones, be affecting our health in unexpected ways? A growing body of …read more Continue reading Mobile Phones and The Question of Declining Sperm Quality
Although wireless standards like 3G, 4G, and 5G are mostly associated with mobile internet, they also include a phone (voice) component. Up till 4G this was done using traditional circuit-switched …read more Continue reading Voice-Over-LTE: The Reason Why Your Phone May Soon Stop Working
LTE networks have taken over from older technologies like GSM in much of the world. Outfitted with the right hardware, like a software defined radio, and the right software, it’s …read more Continue reading LTE Sniffer Ferrets Out Cellular Communications
Mobile phones in schools. If you’re a teacher, school staffer, or a parent, you’ve likely got six hundred opinions about this very topic, and you will have had six hundred …read more Continue reading Plan To Jam Mobile Phones In Schools Is Madness
Retro tech is cool. Retro tech that works is even cooler. When we can see technology working, hold it in our hand, and use it as though we’ve been transported …read more Continue reading How to Run a First-Generation Cell Phone Network
As most in the technology community know, nation states have a suite of powerful tools that can be used to trace and monitor mobile phones. By and large, this comes up in discussions of privacy and legislation now and then, before fading out of the public eye once more. In …read more
Continue reading Cellular Tracking Used During COVID-19 Pandemic
Although hard to believe in the age of cheap IMSI-catchers, “subscriber location privacy” is supposed to be protected by mobile phone protocols. The Authentication and Key Agreement (AKA) protocol provides location privacy for 3G, 4G, and 5G connections, and it’s been broken at a basic enough level that three successive generations of a technology have had some of their secrets laid bare in one fell swoop.
When 3G was developed, long ago now, spoofing cell towers was expensive and difficult enough that the phone’s International Mobile Subscriber Identity (IMSI) was transmitted unencrypted. For 5G, a more secure version based on …read more
Continue reading 5G Cellphone’s Location Privacy Broken Before It’s Even Implemented
Anyone who had a cheap set of computer speakers in the early 2000s has heard it – the rhythmic dit-da-dit-dit of a GSM phone pinging a cell tower once an hour or so. [153armstrong] has a write up on how to capture this on your computer.
It’s incredibly simple to do – simply plug in a set of headphone to the sound card’s microphone jack, leave a mobile phone nearby, hit record, and wait. The headphone wire acts as an antenna, and when the phone transmits, it induces a current in the wire, which is picked up by the soundcard. …read more
Continue reading Detecting Mobile Phone Transmissions With a Sound Card