Archives for AT&T

International Mobile Subscriber Identity (IMSI) Catchers

International Mobile Subscriber Identity (IMSI) catchers are basically spoofed cell towers. There are many different types of IMSI catchers, everything from a home built $1000 unit to a professional grade one which can cost substantially more. The NSA has their own “version” of a GSM IMSI catcher which is called CANDYGRAM. I talked about CANDYGRAM in my article NSA’s Version of a GSM IMSI Catcher CANDYGRAM.   International Mobile Subscriber Identity (IMSI) Catchers As I said above IMSI catchers are basically spoofed cell towers. These spoofed cell towers simply go between you and your handset and the service provider’s real
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Categories: Information Technology, IT Security, and Preston Hood.

Surveillance in the Modern Age

As you may have heard there are many different security agencies and people trying to spy on our every move. Luckily there is still hope for our society. We need to use VERY strong mathematics (cryptography) to put an end to mass surveillance at least at the network level. We can use tools such as the Onion router (Tor), I2P, and Freenet for avoiding someone monitoring your upstream and to provide end-to-end encryption (as long as you don’t exit the Tor network). We also need to use tools such as PGP and OTR messaging to protect our communications that might
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Categories: Information Technology, IT Security, and Preston Hood.