No security is possible online.

Most people say to use Kali Linux, which is good advice but even it does not claim to be an actually secure operating system, since it has zero security/defense features, much less than most versions of Linux.

Qubes is also often touted as "reasonably secure" because it partitions everything into VMs, but what the creator (female) didn't realize, and the developers didn't have the heart to tell her, is that attackers are likely to exploit one of the numerous exploits constantly being discovered in the Xen hypervisor used by Qubes should they wish to attack a Qubes machine.

Other than the above and a few memes and scams it appears that no other OS is recommended for security, rendering the entire concept of "computer security" a scam akin to the medical industry where "cures" merely suppress symptoms momentarily.

>>14
Can't tell if joke or not:
https://en.wikipedia.org/wiki/List_of_companies_involved_in_quantum_computing_or_communication
https://invidio.us/search?q=Quantum+computers+at+work
I do know for a fact Cudder works at Intel playing with theirs.
And yes, encryption is being broken. SHAttered.io was built specifically this way.
The questions isn't "is it" but "how fast." Companies, like Microsoft are investing in PQ algorithms, it's a serious threat.