At the time of this posting Zcash (ZEC) mining contracts are once again available on Genesis Mining!
What Is Zcash?
Zcash is an open source, decentralized cryptocurrency that uses zero-knowledge cryptography to maintain privacy on its blockchain.
Zero-knowledge cryptography, requires a special key to view information about transactions.
https://www.genesis-mining.com/a/634575 USE CODE xthqU2 (Save 3% on hashpower)