Rather than take the routes established by privacy-focused projects, e.g. ring signatures, zk-SNARKs, or Mimblewimble, Decred's new privacy features use a mixnet approach, where they have integrated the mixnet with their Proof-of-Stake (“PoS”) governance system.
ETH is Ethereum's native currency. Ethereum is a global, open-source platform for decentralized applications. On Ethereum, you can write code that controls digital value, runs exactly as programmed, and is accessible anywhere in the world.