Quantum encrypted drive
Tutanota is currently developing a quantum encrypted cloud against the threats of quantum computers regarding encryption algorithms.
Would be awesome to have that level of protection with proton as well.
Maybe a collaboration with tutanota, similar to what happend with simplelogin?

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privacyFirst commented
To the OP - You should be aware that Tuta(nola) is thoroughly bad news. They are not only proprietary, and especially all their existing ('pre-quantum') encryption algorithms are entirely so and as a result are actually quite risky as largely untested and not independently audited. Proton teaming up with Tuta would be a violation of everything that Proton and Open Source stand for.
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privacyFirst commented
I hope people realize that if Proton Drive were fully 'post quantum' securely encrypted, decryption times - even given a fast connection - could become quite annoyingly prolonged at this time.
Proton are already heavily involved in 'post-quantum safe' encryption standards, and I have every confidence that as and when quantum computers could become a serious threat Proton will be among the first or even *the* first to act. Bear in mind we're still a fair long while from this threat. Powerful, stable and reliable quantum machines may not even ever arrive! ;)
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Lasym commented
I believe Proton also works in this security field, see this blog article of theirs : https://proton.me/blog/post-quantum-encryption
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Get better commented
Quantum encrypted =insane security level