First password manager coming to mind because of such things.
Nothing is unhackable.
Hmm. Why don’t you let everyone know what you know about encryption. Or, let everyone know how much you don’t know about encryption by just stating, “Nothing is unhackable”.
Opsec is a treadmill. Everything is hackable. This is why companies hire penetration testers.
I think my knowledge suffices to say that equal to physical security no security is forever safe. At some point a weak point will be exposed.
And if you can get a hand on encrypted content and live long enough with the right ressources and determination you might be able to crack something.
Because afaik it’s all math at some point. Math is logic and logic can be cracked.