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Nightfall - The Open Source Privacy Solution for Ethereum

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Nightfall - The Open Source Privacy Solution for Ethereum

Duration: 00:19:37

Speaker: Duncan Westland, Chaitanya Konda, Michael Connor, Paul Brody

Type: Talk

Expertise: Intermediate

Event: Devcon 5

Date: Oct 2019

We believe that public blockchain is the future of business to business transactions. However, two issues - privacy and scalability - will need to be solved if this vision is to be fully realised. This talk will explain the motivations behind the open-source nightfall code and how it is intended to tackle the first of these issues. We cover the operation of the protocol, the method by which it provides complete privacy, and how developers can use it to build their own applications by making use of its smart contract infrastructure and the ZoKrates framework. We will also present our modelling of transaction costs, which shows that nightfall can already provide a cost-competitive alternative to private blockchains for many situations and how that will be true for a growing number of use cases in the near future.



About the speakers


Chaitanya Konda

Chaitanya is an applied cryptography researcher working in EY's Blockchain R&D. She built Nightfall which is a zero knowledge proof based privacy solution for transferring tokens with privacy. She then worked to decrease the cost of these transactions further, one of the approaches to solve this lead to Nightfall 3, an optimistic zk solution for private transfers of tokens. Along with Polygon, she led the efforts to deploy Nightfall 3, also called Polygon Nightfall, to Ethereum mainnet in May 22


Duncan Westland

Global Blockchain R&D Team Lead

►Duncan leads EY’s global blockchain R&D team, and is responsible for developing new blockchain concepts and products for EY. ►Prior to joining EY Duncan was the CTO of Her Majesty’s Passport Office. There he transformed IT delivery, moving it from a traditional wholly outsourced model to an internally provided Agile service deploying modern DevOps practices.  He was also responsible for developing the cryptography that secures the UK passport and worked on the use of Blockchain for recording travel stamps. ►Previously, Duncan was the biometrics lead for the UK’s ID Cards programme, responsible for the specification and the design of fingerprint and face recognition biometrics for the scheme. Later he applied this technology to passport issuance for detection of fraudulent applications. ►Prior to his public sector role he was a Managing Consultant at PA’s Cambridge Technology centre and worked on a wide variety of cutting-edge technologies, developing several patents during his work.  Duncan has a physics PhD and is a chartered engineer.


Paul Brody

Paul Brody is the global blockchain leader at EY (Ernst & Young). For the last seven years, he has championed the use of public blockchains and open systems for enterprise users and the need for privacy. EY is the only major professional services company focused on the Ethereum ecosystem and committed to public blockchains.

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