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by iraphael 3844 days ago
Apparently, Whatsapp is only end-to-end encrypted on Android, where it uses TextSecure. On iOS, it still uses RC4.
2 comments
simoncion 3844 days ago
Do you have a cite for this?

Signal (née TextSecure) runs on Android and iOS, with an in-development Chrome extension (or whatever) to run where Chrome runs.

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001spartan 3844 days ago
The initial announcement of the partnership between WhatsApp and TextSecure ( https://whispersystems.org/blog/whatsapp/ ) states that it was only for the Android WhatsApp client, and I'm unable to find an update saying that it has been added to the iOS client.
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simoncion 3844 days ago
Oh. Thanks for digging that up.

This quote from the post really stands out to me:

"WhatsApp runs on an incredible number of mobile platforms, so full deployment will be an incremental process as we add TextSecure protocol support into each WhatsApp client platform. We have a ways to go until all mobile platforms are fully supported, but we are moving quickly towards a world where all WhatsApp users will get end-to-end encryption by default."

It seems... unlikely that the crypto integration would be left half-done. I guess I could find a Whatsapp user with an iDevice and another with an Android device and look at the software UI for clues. :D

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whatever_dude 3844 days ago
You are probably correct. They adopted TextSecure on Android near the end of 2014, but I'm not sure of the state of iOS.
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