Parisa Tabriz is a director of engineering and also leads Project Zero, a cybersecurity research core, at Google. Tabriz delivered the opening keynote at a recent conference in Las Vegas, in which she dismissed blockchain's potential as a means of securing data.
https://www.notebookcheck.net/The-head-of-Google-s-Project-Zero-sees-no-future-for-blockchain-in-security.321326.0.html