Ian Miers is a computer science Ph.D. student at Johns Hopkins working on applied cryptography and privacy enhancing technologies. He has done work on anonymous crypto currencies (Zerocoin and Zerocash), decentralized anonymous credentials, and how to decrypt Apple iMessage traffic. His work has been featured in the Washington Post, the New York Times, Wired, and denounced in at least 2 op-eds. He is one of the founders of ZCash, a startup building a crypto currency based on Zerocash.
He has also done work on non-interactive forward secure encryption (i.e. how to build a forward secure version of PGP/GPG). Software for which is available here.