Didn't expect to see Front on HN today, what a pleasant surprise.
There's it's somewhat shortened form "cryptarch", generally more used as a title ("cryptoarcheologist"), which was used in places in the Quantum Thief trilogy of books and is most probably already burned into your brain if you have played any of the Destiny series of videogames (and I presume was heavily influenced by Quantum Thief).
(I don't think Destiny does much with the playful dual meaning, though. Certainly the cryptarchs in Destiny have never yet been meaningful leaders.)
At some point in the future, after the universe has expanded to the extent that other galaxies are moving away from ours faster than the speed of light, someone might read our astronomy papers and wonder whether they can believe something that cannot be verified.
https://phys.org/news/2020-01-evidence-key-assumption-discov...
With the usual disclaimer about one-time pads.
> other fun forms of entropy beyond encryption being cracked such as encodings changing, file formats falling out of service/compatibility, "common knowledge" about slang or memes lost to the ages leaving things indecipherable
I wonder what the digital archaeologists of the future will make of today's programming languages.
(I was going to point out how far we've come since the languages of yesteryear, but we still have such horror-shows as Perl and Bash.)
As with any other security issue, the question is "what is your threat model?" You can still justify encrypting your backup today if your threat model includes today's actors, however much you worry about "the future".
> 10 years from now, it might be as good as plain text.
Or 10 years from now it might be the next Linear A tablets to confuse cryptoarcheologists, unreadable and untranslatable and entirely foreign. If "the future" is in your threat model, don't forget the other fun forms of entropy beyond encryption being cracked such as encodings changing, file formats falling out of service/compatibility, "common knowledge" about slang or memes lost to the ages leaving things indecipherable, and so on and so forth. Most of those things are probably unlikely on only a 10 year time horizon, but you never can tell with "the future".