Re:Maybe we shouldn't skip SHA-3
by nincompope on Friday June 02, 2017 @03:30PM
(#14472678)
As far as I can tell, the increase from 18 to 24 rounds was not NIST's call, but due to the zero-sum distinguishers found on Keccak-f, which made it no longer "hermetic": http://keccak.noekeon.org/NoteZeroSum.pdf
Regarding another variant: yes, you can get more compelling results, and the authors of Keccak themselves have also proposed another function based on Keccak called KangarooTwelve[1]. K12 has much better performance and parallelism than SHA-3 does in software. (Of course, if you don't need most of Keccak's general properties, you're probably fine with other hashes anyway.)
[1] http://keccak.noekeon.org/KangarooTwelve.pdf