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[liberationtech] Revealed: how Whisper app tracks 'anonymous' users

Rich Kulawiec rsk at
Sun May 3 05:47:44 PDT 2015

On Thu, Oct 16, 2014 at 04:54:35PM +0100, Yishay Mor wrote:
> Revealed: how Whisper app tracks 'anonymous' users

It's apparently much, MUCH worse than that:
	"a confederacy of 'privacy' dunces":  what we found under the hood of an 'anonymous' chat app used by millions

That's a fairly lengthy article, so here's a brief excerpt:

	We found many critical issues which we will catalog below in
	the "Technical Details" section, but the short of it is that we
	found that we could:

	    - hijack a users' account
	    - post (publicly or privately) as a hijacked user
	    - view all of a user's current and past private messages 

	In the course of this work we also discovered some other things
	that highlight the broader privacy issues especially as they
	relate to mobile apps and "anonymity" promising services.

	But before we go any further. We'll share a video that
	demonstrates us taking over an account and retrieving past and
	current messages for a hijacked user account (without the user
	knowing). As of this posting, this vulnerability is yet unfixed.


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