3 ms·

I have a femtocell in my home, because my small neighborhood sits in a dead zone. Not a repeater, a full femtocell. To the casual security conscious user, that

I have a femtocell in my home, because my small neighborhood sits in a dead zone. Not a repeater, a full femtocell. To the casual security conscious user, that is probably going to look like a 'stingray', since you will be walking down the street with a gradually dropping RSSI, when all at once, boom, you walk into a five bar signal and life is good. It covers about a 300 ft radius with the most blessedly beautiful signal you can imagine. Maxes out at 100Mb/S, since that is all the backhaul it gets from the ISP where it is connected. (Not that I am complaining about 100/100 in the house.) But it isn't a Stingray. It is a fully secure registered femtocell base station. Given that it hasn't moved in five years, it may well be on someone's map of established cell towers.

thatcat 7y ago
Can you use this device to enumerate imei of passers-by?
- greyhair 7y ago
  No. It is a closed secure box with ssl backhaul to the provider. I was involved in the chip architecture for the silicon that is used in the box as well as the software engineer involved in the secure boot path for the cellular modems. It is one large chip with all the modems and application processors in one chunk of silicon. No unencrypted data, air link or Ethernet back haul, ever leaves the die. From that, I am familiar with the physical design that the manufacturer implemented. (We did a lot of support work to get the manufacturer up and running) They even go so far as to have a physical 'self destruct' button within the box. If you try to physically open it, it will never boot again. The service provider states in the documentation (when you get the box) that if you tamper with the device such that the self-defeat gets activated, you have to pay full retail for the now dead box (they provided the femtocell for free if you live in a dead zone). I laughed when I opened the retail box and that was the first thing in the document stack. Basically a large font "you have been warned"

thatcat 7y ago

Can you use this device to enumerate imei of passers-by?

greyhair 7y ago
No. It is a closed secure box with ssl backhaul to the provider. I was involved in the chip architecture for the silicon that is used in the box as well as the software engineer involved in the secure boot path for the cellular modems. It is one large chip with all the modems and application processors in one chunk of silicon. No unencrypted data, air link or Ethernet back haul, ever leaves the die. From that, I am familiar with the physical design that the manufacturer implemented. (We did a lot of support work to get the manufacturer up and running) They even go so far as to have a physical 'self destruct' button within the box. If you try to physically open it, it will never boot again. The service provider states in the documentation (when you get the box) that if you tamper with the device such that the self-defeat gets activated, you have to pay full retail for the now dead box (they provided the femtocell for free if you live in a dead zone). I laughed when I opened the retail box and that was the first thing in the document stack. Basically a large font "you have been warned"