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Privacy-preserving Smart Contracts at Scale

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Privacy-preserving Smart Contracts at Scale

Duration: 00:30:12

Speaker: Noah Johnson

Type: Talk

Expertise: Beginner

Event: Devcon 4

Date: Oct 2018

In this talk we'll describe Oasis, a platform for privacy-preserving smart contracts at scale. Oasis addresses two critical issues of today's platforms: poor scalability and a requirement that all data is public. These platforms cannot support many exciting use-cases which have complex application logic (e.g. machine learning) or require protection of user or application secrets (e.g. data markets). Oasis is a layer 1 blockchain platform that scales to complex workloads such as machine learning and protects data via secure computing techniques. Oasis's scalability stems from the novel separation of computation and consensus in a layered design. This design allow transactions to execute in parallel before validation by the consensus layer, thus alleviating a major source of congestion and enabling new verifiable computing techniques that dramatically reduce replication needed to ensure integrity. Oasis uses a proof-of-stake consensus algorithm tailored for this architecture and supports multiple secure computing models (trusted hardware, multi-party computation, zero-knowledge proof) based on security and performance requirements. We'll summarize the Oasis protocol and discuss real-world applications built on Oasis in as credit scoring, medical data sharing, and blockchain-based games. We'll describe how Oasis enables these exciting applications to run directly on-chain, avoiding the need for off-chain computation.

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About the speakers

NJ

Noah Johnson

Chief Product Officer

Noah Johnson is Chief Product Officer and co-founder of Oasis Labs. Noah is a PhD candidate at UC Berkeley with expertise in program analysis, security policy enforcement, and privacy-preserving techniques. Noah recently developed the first practical system to provide differential privacy for general statistical queries. This work was featured in Wired and Gizmodo, and is in use today by Uber. Noah has received several awards as a graduate student including the Signature Innovation Fellowship, Sevin Rosen Award for Innovation, and Tony Leong Lim Pre-Doctoral Award. Previously Noah co-led a team of students in the development of DroidBlaze, a platform for automated security analysis and policy enforcement for mobile applications. Noah and advisor Dawn Song commercialized the DroidBlaze platform by founding Ensighta Security, which was acquired by FireEye in 2012.

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