Ari Juels is a professor at the Jacobs Technion-Cornell Institute at Cornell Tech and Computer Science faculty member at Cornell University. Professor Juels’s group has been addressing key technical challenges in the development of blockchain technologies. Blockchains, or distributed ledgers, are a form of database with unusually strong security guarantees. They promise to transform the financial industry by providing a single, authoritative record of transactions across multiple institutions, and have applications in many other domains as well, including identity management for stateless persons / refugees, the creation of new forms of insurance, and the incubation of new marketplaces for virtual goods, among others. Prof. Juels’s group works collaboratively with other Cornell / Tech faculty on these applications under the aegis of the Initiative for CryptoCurrencies and Contracts (IC3), which Prof. Juels co-directs.