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A comment on Facebook to integrate the infrastructure for WhatsApp, Instagram and Messenger. Parent comment

Re:Facebook to integrate the infrastructure for WhatsApp, In... by throwawaymath on Friday January 25, 2019 @02:53PM (#19001826)
An open source client is not required for end-to-end encryption.

Do you see what I'm getting at? We're quibbling about a technically precise definition instead of what you'd like to see in a secure messaging application.

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Re:Facebook to integrate the infrastructure for WhatsApp, In... by JetSpiegel on Friday January 25, 2019 @03:45PM (#19002325)
If it's not open source, the e2e is merely a claim, instead of a verifiable property.
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Re:Facebook to integrate the infrastructure for WhatsApp, In... by feanaro on Friday January 25, 2019 @04:53PM (#19002889)
Yes, this is what I meant. Unless we think of some magical way to verify that e2e is really happening (enter quantum voodoo or something similarly wild), the only way to verify is by actually inspecting the source code. Even this may not be enough, but it is a necessary precondition for now.
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