Did you notice these claims?
"KSI is based on a distributed consensus protocol that can currently process billions of transactions per second, has real-time settlement and verification, uses 1000 USD of power every day and has O(t) space complexity – i.e. the block-chain size grows at a fixed small rate over time independent from the number of transactions. " http://guardtime.com/blog/our-answer-to-peter-thiel-start-with-integrity
It's from the Estonian company Guardtime. Being in the business of "Enterprise Software" technical details seems to be mostly proprietary and shared with customers or prospects only.
While this might not be suitable for mining, it seems it could be applied to Smart Contract Consensus.