Dr Nicolas T. Courtois in an academic cryptographer with substantial industry experience. He is an author of 100+ academic publications in cryptography, totalling some 6100 citations according to Google Scholar. Most of his academic work is about defeating the security in practical systems used by millions of people every day. He has developed numerous (more or less practically feasible) attacks which allow to recover sensitive cryptographic keys in bitcoin, London Oyster cards, building RFID cards, car locks, SIM cards, mobile phones, etc. He is also an expert on security engineering and has 8 patents on industrial/applied cryptography. At University College London he teaches about applied cryptography and cryptanalysis and runs a research seminar on bitcoin and crypto currency, cf.blog.bettercrypto.com. He has co-authored several papers about bitcoin and graduated some 20 students doing a thesis on crypto currency topics.