Kostas Chalkias

Kostantinos Chalkias is Co-Founder and Chief Cryptographer at Mysten Labs. Ex-Facebook cryptography lead (Libra, Novi, WhatsApp) and previously head of research at R3 (UK) for the Corda blockchain and Conclave SGX. Before that, a CTO in two Security + Big Data companies, Erybo (CA) and Safemarket (GR). Technical Summary and Achievements: • Ranked in the Top20 StackOverflow users coming from Greece (on Java related questions) and 1st between recent Greek StackOverflow members joined StackOverflow after 2014. • 20+ years in software engineering acting as a Team Leader and Lead Software Developer in various US, UK and Greek based entities. CTO for 6 years in a Big Data and Security oriented US-based startup. • An active Cryptography and Big Data researcher, currently focusing on blockchain security and novel smart contracts, post quantum signatures and zero knowledge proofs. • Have published more than 50 scientific papers, mainly known for my work in Zero Knowledge Proofs, EdDSA scheme, Base64 attacks, Proofs of solvency community standard lead, Timed-Release Encryption, Graphical Passwords, the Saferandom protocol and Key-Compromise attacks having proposed some of the fastest protocols in the field and analysed potential attack vectors. • Have received a Best Paper award for 3 times, filed 8 US patents, ranked 1st in Computer Science MSc studies, received one of the most appreciated national scholarship programs (4 years in a row) and ranked on the Top3 in National IT Innovation Contests twice. • Teaching Assistant for ~10 years at the University of Macedonia (Java, R, Cryptography, Chaos Theory, Statistics). • Founder of the largest Big Data Meetup group in Athens, Greece, with a healthy and growing community of 2000+ members.