Tue, January 31, 2023 Today we are happy to announce that we are open-sourcing our implementation of HyperPlonk under the open-source MIT license. We are collaborating with the Ethereum Foundation on integrating HyperPlonk with the popular Halo2 library and frontend. …

Mon, November 28, 2022 At Espresso Systems, we are building the tools and infrastructure to bring Web3 applications mainstream, taking on challenges from privacy to performance. Over the last year, we have been excited to witness and contribute to the development of layer-2 (L2) rollups that promise to bring higher…

Sun, October 23, 2022 By: Binyi Chen and Benedikt Bünz Paper: https://eprint.iacr.org/2022/1355 The core building block of both privacy and scalability for blockchains are zero-knowledge proof systems. These systems allow a prover to convince a verifier that some state transition was done correctly. This could, for example, be a CAPE…

Sun, September 11, 2022 By: Ben Fisch In wake of the US Treasury department sanctioning Tornado Cash (TC), people (including myself) have resurfaced the idea that users of privacy protocols like TC can use zero-knowledge proofs to demonstrate that their withdrawals are not transactions from sanctioned entities. The goal is…

Sun, August 14, 2022 By: Jill Gunter Last week, several key players in the cryptocurrency and Web3 ecosystem halted assets or stopped providing services to certain wallets in an effort to ensure compliance with new sanctions against the privacy-preserving smart contract application, Tornado Cash. Circle (the creator of major stablecoin…

Wed, July 06, 2022 By: Alex Xiong TL;DR: As part of our effort in exploring private smart contract solutions, we developed a decentralized private computation (DPC) system, VERI-ZEXE, that supports universal setup. VERI-ZEXE improves the state-of-the-art [1] by ~9.0x on transaction generation and ~2.6x …

Wed, June 15, 2022 Today we are excited to release the wallet and graphical user interface for Configurable Asset Privacy for Ethereum (CAPE). The product is currently live on Ethereum’s Goerli testnet for users to start building and experimenting with. You can get started here. Configurable Asset Privacy offers asset…

Sun, March 06, 2022 In conjunction with announcing Espresso, we’re excited to release the Jellyfish cryptography library. Jellyfish is a toolkit of various cryptographic primitives — ranging from hash functions to accumulators to zero-knowledge proof systems. It is fully implemented in Rust, allowing for remarkable efficiency and correctness. …

Mon, November 28, 2022 The Espresso Sequencer is a system that decentralizes transaction sequencing for layer-2 scaling solutions on Ethereum without compromising on their scale and speed. At the core of the Espresso Sequencer is a consensus protocol that prioritizes high throughput and fast finality. We have designed this protocol…