36C3: Phyphox – Using Smartphone Sensors For Physics Experiments

It’s no secret that the average smart phone today packs an abundance of gadgets fitting in your pocket, which could have easily filled a car trunk a few decades ago. We like to think about video cameras, music playing equipment, and maybe even telephones here, but let’s not ignore the …read more

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5G Cellphone’s Location Privacy Broken Before It’s Even Implemented

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

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Cops Can Find the Location of Any Phone in the Country in Seconds, and a Senator Wants to Know Why

Here are the letters Senator Ron Wyden sent to mobile carriers and the FCC demanding answers and action on the recently highlighted law enforcement service to easily track phones across the country. Continue reading Cops Can Find the Location of Any Phone in the Country in Seconds, and a Senator Wants to Know Why

4 reasons for slow mobile internet speeds

Have you ever gotten frustrated with your phone because the browser took more than five minutes to load? Before you start blaming your old phone, check out these four reasons that might be the cause of sluggish internet connection.
Router location
One… Continue reading 4 reasons for slow mobile internet speeds

Senator questions DHS about surveillance technology used in U.S. by foreign spies

Sen. Ron Wyden, D-Ore., is requesting information from the Department of Homeland Security concerning the use of foreign cell phone surveillance devices in the U.S., according a letter posted Monday to the Senator’s website. Wyden’s inquiry specifically looks at issues surrounding the use of IMSI catchers, also known as international mobile subscriber identity collectors. An IMSI catcher is an inexpensive spying tool that can essentially act as a fake cell phone tower to intercept calls, text messages and other location information that normally emits from mobile phones. The letter, dated Nov. 17, asks Christopher Krebs, an acting DHS undersecretary, if the agency is aware of foreign-operated IMSI catchers in the Washington, D.C. area or in other major cities. “I am very concerned by this threat and urge the Department of Homeland Security (DHS) to improve its efforts to detect such activity,” Wyden writes. “Foreign government surveillance of senior American political and […]

The post Senator questions DHS about surveillance technology used in U.S. by foreign spies appeared first on Cyberscoop.

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Detecting Mobile Phone Transmissions With a Sound Card

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

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Smartphone Bench Instrument Apps: Disappointment or Delight?

If you are interested in electronics or engineering, you’ll have noticed a host of useful-sounding apps to help you in your design and build work. There are calculators, design aids, and somewhat intriguingly, apps that claim to offer an entire instrument on your phone. A few of them are produced to support external third-party USB instrument peripherals, but most of them claim to offer the functionality using just the hardware within the phone. Why buy an expensive oscilloscope, spectrum analyzer, or signal generator, when you can simply download one for free?

Those who celebrate Christmas somewhere with a British tradition  …read more

Continue reading Smartphone Bench Instrument Apps: Disappointment or Delight?

Smartphone Bench Instrument Apps: Disappointment or Delight?

If you are interested in electronics or engineering, you’ll have noticed a host of useful-sounding apps to help you in your design and build work. There are calculators, design aids, and somewhat intriguingly, apps that claim to offer an entire instrument on your phone. A few of them are produced to support external third-party USB instrument peripherals, but most of them claim to offer the functionality using just the hardware within the phone. Why buy an expensive oscilloscope, spectrum analyzer, or signal generator, when you can simply download one for free?

Those who celebrate Christmas somewhere with a British tradition  …read more

Continue reading Smartphone Bench Instrument Apps: Disappointment or Delight?