Apparently the “compression” (seems to be more like Voder/Vocoder) used on 3G phones has a very low “spectrum sample rate”, and combined with crap echo-suppression-suppression, makes this a no-go. Even dead-simple 300 baud FSK did not work. Always a risk) my security endpoint was not on the same device as my communications endpoint. The idea was to make sure that (barring some amount of metadata from SigInt. The complexity of mobile communications means that there is plenty of haystack to hide that needle.Ī while ago I tried an experiment of using the builtin modem of a (very) old laptop via the headset jack of a dumb flip-phone. ![]() All you have is the manufacturer’s word that there are no back doors, or maybe the carrier’s word that they are locked. ![]() Dumb phones are really alleged dumb phones.
0 Comments
Leave a Reply. |