DuckDuckGo has a library for this: https://github.com/duckduckgo/smarter-encryption https://github.com/duckduckgo/smarter-encryption At the core it does what t

DuckDuckGo has a library for this: https://github.com/duckduckgo/smarter-encryption https://github.com/duckduckgo/smarter-encryption At the core it does what the op is proposing, but there's a bit of an extra complexity to deal with edge cases and regressions.