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conference paper

Rethinking General-Purpose Decentralized Computing

Alp, Enis Ceyhun  
•
Kokoris-Kogias, Eleftherios  
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Fragkouli, Georgia  
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January 1, 2019
HotOS '19: Proceedings of the Workshop on Hot Topics in Operating Systems
Workshop on Hot Topics in Operating Systems (HotOS)

While showing great promise, smart contracts are difficult to program correctly, as they need a deep understanding of cryptography and distributed algorithms, and offer limited functionality, as they have to be deterministic and cannot operate on secret data. In this paper we present Protean, a general-purpose decentralized computing platform that addresses these limitations by moving from a monolithic execution model, where all participating nodes store all the state and execute every computation, to a modular execution-model. Protean employs secure specialized modules, called functional units, for building decentralized applications that are currently insecure or impossible to implement with smart contracts. Each functional unit is a distributed system that provides a special-purpose functionality by exposing atomic transactions to the smart-contract developer. Combining these transactions into arbitrarily-defined workflows, developers can build a larger class of decentralized applications, such as provably-secure and fair lotteries or e-voting.

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