Phala Network: A Con dential Smart Contract Network Based ...

Phala Network : A Confidential Smart ContractNetwork Based on PolkadotHang YinShunfan ZhouJun JiangOctober 17, 20191 IntroductionNowadays the security of the permissionless blockchain is typically guaranteedby state replication over consensus algorithms. Though this approach workswell for blockchain , it also means that everything on the blockchain ispublic,which brings a problem: confidential information cannot be handled by theblockchain. The lack of confidentiality greatly limits the usage of blockchain inprocessing sensitive business and user data.

Ekiden [9] xed these problems by introducing a TEE-blockchain hybrid architecture and implemented a high performance con dential smart contract platform. However, contracts in Ekiden are isolated, which means the contracts cannot interoperate with each other, let alone external blockchains. Interoper-ability is a keystone of modern smart contracts.

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  Network, Alpha, Hybrid, Blockchain, Phala network, Hybrid blockchain

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