Wanchain's blockchain builds upon the strengths and robustness of Ethereum. Any Ethereum Dapp will run on Wanchain with zero code changes, yet, applications can be enhanced with Wanchain's APIs to leverage privacy protection and cross-chain capabilities. Ring signature provides complete anonymity to the signer of a transaction, and yet provides the ability for the receiver to correctly verify that the sender did in fact sign the transaction. The optional One Time Addresses (OTA) provides complete anonymity for the receiver of every transaction.