your sensitive data today (photos, money, files etc) can be made public within a decadethis includes state secretsthis a crazy fact about quantum computersthe so called harvest now, decrypt later attacksbasically, in many cases on the internet you can see encrypted versions of your data (passwords etc)today, you are safe because no computer is strong enough to break encryption — only theoretical quantum computers can do this*however* you can store the encrypted version of the data and then decrypt it later ...