> EFF has criticized WhatsApp for being closed source, but not for this particular aspect of the key exchange functionality. The articles I've seen appeared ca

> EFF has criticized WhatsApp for being closed source, but not for this particular aspect of the key exchange functionality. The articles I've seen appeared carefully worded so as to achieve some balance, but did express some criticism and concern. "Nevertheless, this is certainly a vulnerability of WhatsApp, and they should give users the choice to opt into more restrictive Signal-like defaults." from: https://www.eff.org/deeplinks/2017/01/google-launches-key-transparency-while-tradeoff-whatsapp-called-backdoor https://www.eff.org/deeplinks/2017/01/google-launches-key-tr... Key change notification concerns paragraph from: https://www.eff.org/deeplinks/2016/10/where-whatsapp-went-wrong-effs-four-biggest-security-concerns https://www.eff.org/deeplinks/2016/10/where-whatsapp-went-wr...