ZK-LDN 0x03: Scalability and privacy - Commit-chains and Mixers from zk-SNARKs

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You’re invited to join us for our third Zero Knowledge meetup in London on the 23rd of July! We will be hosting Rami Khalil from Liquidity.Network and Olivier van den Biggelaar from Argent.

Rami is the co-founder of Liquidity.Network. He will be presenting his work on NOCUST-ZKP, a variant of NOCUST that depends on recursively composable zkSNARKS for ensuring the consistency of data behind commitments. Olivier is an Ethereum Engineer at Argent. He will be Argent's first ZK project: Hopper, an open-source Mixer for mobile and web-friendly private transfers on Ethereum.

Schedule:
6:30-7:00 pm: Greetings, food and drinks (including vegan options)
7:00-7:50 pm: Presentation from Rami Khalil (Liquidity.network)[masked]:40 pm: Presentation from Olivier van den Biggelaar (Argent)

Read more about zk-SNARKs: https://blog.decentriq.ch/zk-snarks-primer-part-one/

Thanks to our sponsors for helping us put this event together: Beam (https://www.beam.mw/), Applied Blockchain (https://appliedblockchain.com/), Aztec Protocol (https://www.aztecprotocol.com/) and Cambrial Capital (https://cambrial.com).
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Below are the abstracts and bios of our speakers:

Talk: NOCUST-ZKP: A Provably Consistent 2nd-Layer Protocol

This talk will be about NOCUST-ZKP, a variant of NOCUST that depends on recursively composable zkSNARKS for ensuring the consistency of data behind commitments. The talk will briefly review NOCUST, a novel 2nd-layer solution for micropayments, and then focus on the challenges behind augmenting it with zkSNARKS to increase the security and reliability of the system. Users in NOCUST can issue different kinds of challenges to prevent misbehavior, and this talk will explain how the addition of zkSNARKS can reduce potential attack vectors and strengthen the system such that it only requires one simple data availability challenge.

Bio:
Rami Is the co-founder of Liquidity.Network, the company pushing forward NOCUST and TEX, two 2nd-Layer solutions for scaling blockchains. Rami has a Masters in Information Security from ETH Zurich and is now pursuing a PhD in Blockchain Security, Scalability, and Privacy at Imperial College London. Previously, he worked at Facebook and Gnosis.

More info about NOCUST: https://liquidity.network/

Talk title: Hopper: Mobile & Web-friendly private transfers on Ethereum

This talk will explain how the Hopper mixer works. Hopper is an Open-Source Mixer for mobile and web-friendly private transfers on Ethereum. It allows the private transfer of value from one Ethereum account to another, via an iOS client. Users can deposit notes of 1 ETH into a mixer smart contract and withdraw them later to a different account by only providing a Zero-Knowledge proof (zkSNARK) that they previously deposited a note into the mixer, without revealing from which account that note was sent. Relayers are used to post transactions to the blockchain so that the recipient of a private transfer can withdraw a private note from the mixer without needing any prior ether.

Bio: Olivier is an Ethereum Engineer at Argent. He obtained his PhD in Telecommunication Engineering from Université libre de Bruxelles. Prior to working in the blockchain space, Olivier developed mobile games, built recommendation engines and ran a medical imaging startup.

More info about Argent: https://www.argent.xyz/