Cornelius is into multi factor authentication since 2004. He is the project lead of the MFA system privacyIDEA.
As a consultant he learnt to unterstand customers requirements in heterogenous networks. He planned and implemented several PKIs for smartcard usage and was one of the first to work on the interoperability of the Aladdin eToken.
In 2006 he started one of the the first open source one time password systems. In 2009 he initiated an enterprise OTP solution. In 2014 he kicked off the privacyIDEA project. It is a vendor independent authentication system, which can be used to manage arbitrary authentication objects for multi factor authentication. privacyIDEA supports authentication protocols like PAM, RADIUS, SAML or LDAP. In 2014 he also founded the company NetKnights to provide consultancy for strong authentication.
Cornelius spoke at several conferences in Germany, in the Netherlands, in Belgium (FOSDEM), in Denmark and in the U.S.