Zerocash: Decentralized Anonymous Payments from Bitcoin (extended version)
This paper constructs a full-fledged ledger-based digital currency with strong privacy guarantees. The results leverage recent advances in zero-knowledge Succinct Non-interactive ARguments of Knowledge (zk-SNARKs).
Darkcoin: Peer-to-Peer Crypto-Currency with Anonymous Blockchain Transactions and an Improved Proof-of-Work System
Darkcoin is the first privacy centric cryptographic currency based on Satoshi Nakamoto’s Bitcoin. DarkSend, a technology for sending anonymous block transactions is incorporated directly into the client using extensions to the core protocol. An improved proof-of-work using a chain of hashing algorithms replaces the SHA256 algorithm and will result in a slower encroachment of more advanced mining technologies (such as ASIC devices). DarkGravityWave is implemented to provide quick response to large mining power fluctuations.