Thread: Purism Librem Phone
View Single Post
Venemo's Avatar
Venemo is offline Venemo
2017-09-28 , 09:03
Posts: 1,296 | Thanked: 1,773 times | Joined on Aug 2009 @ Budapest, Hungary
#90
Originally Posted by wicket View Post
The baseband is a big proprietary black box. We have no idea what goes on inside of it. If privacy was my top concern, I'd feel much safer with a device that has a sandboxed baseband than one that doesn't.
The "sandbox" means:
  1. The modem does not access system memory
  2. Power input of the modem is controlled by the application processor
  3. Audio input of the modem is controlled by the application processor

The above points are effective solved by having a separate module or chip for the modem and only communicating with it via a simple serial port. Plus, adding a switch to its power supply and audio.

However, some people are even more paranoid and add an RF switch between the modem and the antenna, "just to be sure".

Not sure how far the Neo900 and the Purism go with this, though. (Neo900 had a detailed doc somewhere but I can't find it now.)
__________________
You should follow me on Twitter!

Apps: Puzzle Master, IRC Chatter for Harmattan, IRC for Sailfish
 

The Following 6 Users Say Thank You to Venemo For This Useful Post: