SERO is a privacy coin Protocol supporting smart contract using Zero-Knowledge Proof. SERO adopt innovative UTXO+Account mixed mode. SERO is also a Privacy Protection platform which allows developers to issue privacy coins and use them in DApps, that means DApps can have Privacy features. It built a Zero-Knowledge Proof encryption library "Super-ZK" which is 20+ times faster than the latest zk-SNARKs (Sapling upgrade) that Zcash uses.