Ben Fisch is co-founder and CEO of Espresso Systems, the developers of the Espresso Sequencer network which brings decentralization and improved interoperability to L2s. Espresso Systems are also the developers of the CAPE data privacy application. Ben is additionally an assistant professor of computer science at Yale. Previously, Ben earned his PhD at Stanford working in the applied cryptography research group. His research on Verifiable Delay Functions (VDFs) sparked a multimillion dollar industry initiative (see VDF Alliance) and plays an important role in several blockchains including Ethereum 2.0, Chia, and Filecoin. His research on Proofs of Replication is the basis of Filecoin's incentive layer and consensus protocol. Filecoin is a live distributed storage system that already has reached a storage capacity exceeding 1.5 exabytes.