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Community Council | Posts: 4,920 | Thanked: 12,867 times | Joined on May 2012 @ Southerrn Finland
#212
Originally Posted by Larswad View Post
one thing I just don't understand in this discussion (not arguing, just don't understand). Why would the modem as a part of the SoC be a threat to the information integrity? I see it merely as a wcdma transport, if encrypted information goes in it just transfer it to the uplink, it goes over the rnc, to the downlink and to the modem of some other device. Sure, we don't know what goes on inside it, but if the data is encrypted it remains so the whole way. I suppose you say that there is a possibility or probability that it would relay the data to a third party (e.g. government)? In such case I suppose that weakness could be present through the whole chain, as usual. compromised servers etc. I don't get it. It's a passive component right? Are we making a hen of a feather?
There are designs where the modem (and other parts of the system which run closed firmware blobs) is a separate HW entity which is connected to the main processing engine via a serial bus. In these cases you can treat it just as you describe, a black box that transmits your data up and down.

However, in some other designs the HW running closed blobs can directly access the flash&main memory of the device, and you have absolutely no guarantees on what it is reading/writing there (and when it does so)
The Qualcomm chipsets fall in the latter category
 

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