---------- Forwarded message ---------- From: Steve Glass <stevie.glass@gmail.com> Date: Sun, 18 Oct 2015 08:14:47 +1000 Subject: Re: [Gsmmap] How much of the IMSI Catcher Score can be derived WITHOUT a mobile phone ? An SDR can, in theory, capture more information that is just available to the phone and can do so passively. Many of the same metrics apply but can be derived from other traffic, e.g., for C1 the presence of any unencrypted traffic on any channel in countries where traffic is normally encrypted is a big giveaway. Passively monitoring traffic gives a more complete picture. It is, however, a game that a much smaller number of participants can play because the hardware requirements are for a suitable SDR rather than just a Qualcomm-equiped Android phone.