I admire and respect Moxie and Whisper co very much, but if we are indeed
worried about "metadata", then the current implementation of TextSecure does
not help you at all. While the messages are encrypted, who you are texting and
when, and generally the volume of what you are saying, or whether you are
sending an SMS or MMS is clearly visible to mobile operators. This is not a
bug, but an aspect of the reliance upon SMS service and not IP.
This hasn't stopped me from recommending TextSecure to many people, especially
in places where mobile 3G is hard to come by.
It is critical, however, to understand and communicate to novice users how
different countermeasures are effective against different types of threats and
modes of surveillance.
+n
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