Dionysis is a PhD student in cryptography and blockchain technologies at the University of Athens, working under professor Aggelos Kiayias. His research interests include blockchain foundations, provable security of the permissionless consensus layer, decentralized trust, and compression security. He has published and presented at world-class conferences such as Black Hat, Financial Crypto, Real World Crypto, FOSDEM, BSides, ECESCON, FOSSCOMM. He is the co-founder of OpenBazaar, the first cryptocurrency-based anonymous decentralized marketplace. Some of his important contributions to the field include Rupture, a compression attack framework; and Trust is Risk, the first Sybil-resilient decentralized trust network.
He is a security and software engineer by training. His professional experience includes working for DeviantArt in Los Angeles, the Incident Response Development team at Google in Zurich where he developed open source incident response tools, and the Product Security team of Twitter in San Francisco where he helped shape the next version of the Content Security Policy W3C standard. He has founded several start-ups in various fields from social networking to video game development.
Dionysis holds an Electrical and Computer Engineering degree from the National Technical University of Athens with a major in Computer Science. He works for IOHK as a researcher through a long-term collaboration between IOHK and the Blockchain Technology Lab at the University of Athens.
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