Privacy and scalability are arguably the most challenging issues blockchains face. Scalable privacy-preserving state machines are inherently difficult. While cryptocurrencies like Zcash have proven trustworthy for simple transactions, privacy in smart contract platforms is an entirely different animal. We’re joined by Guy Zyskind, CEO of Enigma, a platform for scalable decentralized apps which preserves privacy. The Enigma network treats Ethereum smart contracts as “secret contracts” and can perform computations on encrypted data. Inputs are broken into pieces and distributed to network nodes which perform computations on a segment of the full data. Once returned to the Ethreum chain, data is reassembled and may be decrypted to reveal the result. Leveraging secure multi-party computation and Trusted Execution Environments (TEE), Enigma prevents a malicious actor from gaining access to the input data and the computation results. Topics covered in this episode: Guy’s background and secure computation research at MIT The different approaches to privacy preservation in computing The different multi-party computations methods and how they work Fully Homomorphic Encryption in the context of MPC How Enigma would preserve privacy for a simple application like tallying votes How Enigma reads encrypted data from the Ethereum network and leverages Trusted Execution Environments to perform computations How developers build smart contracts which use Enigma The role of the Enigma token as an incentive mechanism How Enigma ensures network availability by penalizing nodes which go offline The current state of the project and upcoming milestones Episode links: Enigma Website Enigma Protocol Docs Enigma White Paper Decentralizing Privacy: Using Blockchain to Protect Personal Data Guy Zyskind's Personal Website This episode is hosted by Sébastien Couture and Sunny Aggarwal. Show notes and listening options: epicenter.tv/246

The 2016 Ethereum hard fork left us with two distinct Ethereum chains. While the main Ethereum chain dwarfs Ethereum Classic in terms of market cap, ETC has sustained its position as a significant actor in the broader blockchain ecosystem. ETC’s recent listing on Coinbase demonstrates its credibility as a significant industry player. We’re joined by Anthony Lusardi, Director of the Ethereum Classic Cooperative, an organization who’s goal is to promote the development of the Ethereum Classic Network. Similarly to other industry organizations, The Cooperative invests in core development of the ETC blockchain, community building, marketing, and brand awareness. Topics covered in this episode: Anthony’s background and how he became involved in the crypto community The Ethereum Classic Cooperative and the goals of the organization What the ETC ecosystem looks like two years after the fork The people and companies contributing to the project and building on the platform The overlap and friction points with the broader Ethereum community ETC’s unique value proposition as a blockchain platform SputnikVM as an alternative to the Ethereum Virtual Machine The potential attack vectors on ETC, including 51% attacks Why the ETC community stands behind Proof-of-Work The Cooperative’s plans to remain relevant and the project’s development roadmap Episode links: Ethereum Classic Cooperative Website Ethereum Classic Website Crypto51: Cost of a 51% Attack for Different Cryptocurrencies @eth_classic on Twitter This episode is hosted by Sébastien Couture and Sunny Aggarwal. Show notes and listening options: epicenter.tv/244