Zcash is a decentralized and open-source cryptocurrency that offers privacy and selective transparency of transactions. Zcash payments are published on a public blockchain, but the sender, recipient, and amount of a transaction remain private. Zcash is based on peer-reviewed cryptographic research, and built by a security-specialized engineering team on an open source platform based on Bitcoin Core's battle-tested codebase. Our improvement over Bitcoin is the addition of privacy. Zcash uses advanced cryptographic techniques, namely zero-knowledge proofs, to guarantee the validity of transactions without revealing additional information about them. How Zcash works Zcash encrypts the contents of shielded transactions. Since the payment information is encrypted, the protocol uses a novel cryptographic method to verify their validity. Zcash uses a zero-knowledge proof construction called a zk-SNARK, developed by our team of experienced cryptographers based on recent breakthroughs in cryptography. These constructions allow the network to maintain a secure ledger of balances without disclosing the parties or amounts involved. Instead of publicly demonstrating spend-authority and transaction values, the transaction metadata is encrypted and zk-SNARKs are used to prove that nobody is cheating or stealing. Zcash also enables users to send public payments which work similarly to Bitcoin. With the support for both shielded and transparent addresses, users can choose to send Zcash privately or publicly. Zcash payments sent from a shielded address to a transparent address reveal the received balance, while payments from a transparent address to a shielded address protect the receiving value. Check out CoinBureau for guide on What is ZCash.
Origo Network aims to feature privacy as one of the main drivers of adopting decentralized applications (dApps). Nowhere is the need for privacy more paramount than in the collection of identity and behavior data. What is Origo? A scalable privacy preserving platform for decentralized applications. Origo token is the fuel to operate privacy preserving features on Origo network. A privacy preserving protocol that supports complete privacy protection for not only transactions but also smart contracts Origo Features - Origo Privacy Preserving Protocol - complete privacy preserving technology for smart contract input and output backed by Zero Knowledge Proof - Tailored Scalability Design for Privacy - Sharding + Stateless Client + Origo Consensus (enhanced PoS: a game theory based reward-punishment protocol)