- Fix TLS. Let’s get rid of certificates. (A clarification and some improvements.) (February 28, 2017)
- Fix TLS. Let's get rid of certificates. (February 26, 2017)
- Improving (i)Cloud security. (September 6, 2014)
- Active authentication: continuously making sure that the owner of a smart phone is actually using it. (June 2, 2014)
- UbiKiMa : migrating from passwords to secure authentication. (November 19, 2013)
- When will users drop their passwords (and move to a more secure form of authentication)? (October 21, 2013)
- The Future of Authenticating Websites (FAWN) - 2 (October 24, 2011)
- The Future of Authenticating Websites (FAWN) - 1 (October 6, 2011)
- Using a mobile phone number as an authentic identifier (April 27, 2010)
- Fast anonymous credentials on smart cards (March 31, 2010)
- SMS authenticatie: nog steeds waardevol (voor two-factor authentication). (January 12, 2010)