It does not matter to me whether the “The Guardian Falsely Slammed WhatsApp For a “Security Backdoor” – It’s Actually Not” according to a Peter Stone thread on Peerlyst.
Bruce Schneier also weighed into the debate saying “This is not a backdoor. This really isn’t even a flaw. It’s a design decision that put usability ahead of security in this particular instance.”
Tellingly though he went to say that “How serious this is depends on your threat model. If you are worried about the US government — or any other government that can pressure Facebook — snooping on your messages, then this is a small vulnerability. If not, then it’s nothing to worry about.”
The main stream media sponsored spat had @Moxie from @WhisperSystems siding with @WhatsApp and @Facebook in a face off against @Guardian and their contributor @tobiasboelter (Security and Crypto at UC Berkeley) in a “man in the middle” versus “design” versus “vulnerability” versus “backdoor” versus “privacy” versus “convenience” versus “user experience” tit for tat.
If you take Schneier’s statement about who should worry about the WhatsApp “design choice” in handling “blocking” / “non-blocking” then irony drips from Moxie’s apologist defence of the WhatsApp handling of key changes when one notes that in a Jun 12, 2013 blog post he wrote “We Should All Have Something To Hide” .
Moxie at Open Whisper Systems, the designers of the well respected SIGNAL encrypted voice and messaging app, responded to the “backdoor” allegations in WhatsApp’s implementation of the SIGNAL protocol in a blog post on their site.
It was in response to Mr. Boelter’s piece in the Guardian newspaper “WhatsApp vulnerability explained: by the man who discovered it” which they say was in response to the Facebook denial that the vulnerability was a deliberate loophole.
The debate is complicated for people not involved in the security industry there are pro’s and con’s in the arguments that both sides make. Some of it is pure semantics, some of it represents shades of opinion other aspects are “interpretations”.
It all essentially stems from WhatsApp approach to handling encryption key changes in certain scenarios and their attitude to “non-blocking”. SIGNAL handles all key changes with “blocking” but WhatsApp chooses to go with “non-blocking”. There is therefore a fundamental difference between the WhatsApp app’s implementation of the Open Whisper System protocol and the implementation that underpins the SIGNAL app.
The integrity of the SIGNAL app is not being questioned. The Wall Street Journal stated about the latter in a Jan. 24, 2017 11:16 a.m. ET article that “Messaging App Has Bipartisan Support Amid Hacking Concerns” describing SIGNAL “as a smartphone app that allows users to send encrypted messages, is gaining popularity in the political world amid rising fears about hacking and surveillance in the wake of a tumultuous election year.”
My worry is not about WhatsApp’s Open Whisper Systems implementation because frankly I would not use it. I would not use it because I do not trust Facebook (the owners of WhatsApp or Zuckerberg). Zuckerberg because he tried to cover up the Facebook facilitation of the NSA PRISM program before the Snowden revelations embarrassed him into trying to apply a retrofit fix to his betrayal of Facebook users. And WhatsApp because frankly they are sharing their users data with Facebook despite denials.
When the advocates become apologists for the mainstream then they longer deserve to be called advocates in the purest sense of the word. And Moxie does consider himself “pure”. He is not.
In July 2016 Wired wrote “Meet Moxie Marlinspike, the Anarchist Bringing Encryption to All of Us” but being an “anarchist” and an ally of Zuckerberg are incompatible ideological stances.