There are a lot of topics in software engineering that are the result of accumulated intuition over decades. But we've had a pretty good definition of abstraction since 1977, originally in the context of program analysis, and — I claim — it actually translates quite well into a precise definition of “abstraction” in engineering.

...just not all the other things that programmers tend to throw the word "abstraction" at

Clevis is a pluggable framework for automated decryption. It can be used to provide automated decryption of data or even automated unlocking of LUKS volumes.