3 ms·
Oh, that is a fair point. Though, not receiving any information back, draws the tracking practice significantly more difficult.
by alandarev 13y ago
Oh, that is a fair point.
Though, not receiving any information back, draws the tracking practice significantly more difficult.
- Theodores 13y agoIt need only reply if it is requested to do so, therefore for 99.9 recurring percent of the time there need be nothing observable.
- alexwright 13y agoOr reply in some side channel, piggy back the next (expected, ie when the user has switch back to normal mode) UMTS radio packet for example. I don't know the packet structure but I expect there are areas that could be re-purposed covertly. We did after all fit the entire SMS system into such a space.