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“Cyph is the only encryption app that is secure to use in a web browser, thanks to our patented WebSign technology.”

Run, don’t walk away from vendors making these claims.

Maybe their claim is a bit more valid than those of other systems with equally bold claims [0].

It may be valid against closed source apps, but I don't see how it can be more secure than build-and-self-host OSS apps for private messaging.

IMHO their claim is invalidated by appeal to patents. Patents are a sure fire way to ensure that even the most clever of cryptographic constructions is never used in the real world.

Open is better than closed. Non-patented encumbered is better that encumbered.

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