SoK
Shayan Eskandari, Mehdi Salehi, Wanyun Catherine Gu, Jeremy Clark
Abstract
One fundamental limitation of blockchain-based smart contracts is that they execute in a closed environment. Thus, they only have access to data and functionality that is already on the blockchain, or is fed into the blockchain. Any interactions with the real world need to be mediated by a bridge service, which is called an oracle. As decentralized applications mature, oracles are playing an increasingly prominent role. With their evolution comes more attacks, necessitating greater attention to their trust model. In this systemization of knowledge paper (SoK), we dissect the design alternatives for oracles, showcase attacks, and discuss attack mitigation strategies.
Topics & Concepts
BlockchainOracleComputer scienceComputer securitySmart contractBridge (graph theory)Service (business)Internet privacyWorld Wide WebBusinessSoftware engineeringMarketingMedicineInternal medicineBlockchain Technology Applications and SecurityCryptography and Data SecurityPrivacy-Preserving Technologies in Data