> Limiting itself to reversible operations gives some mathematical niceties
What are those niceties, why is a reversible operation desirable in this context?
What are those niceties, why is a reversible operation desirable in this context?
This is actually a lot easier than it sounds. As long as every n-bit integer operation used in the hash function is reversible, then the hash function has this property. An operation is reversible if, given its output, you can unambiguously compute its input."
2018: https://news.ycombinator.com/item?id=17659672 (14 comments)
2021: https://news.ycombinator.com/item?id=29117783 (1 comment)