Daniel Fett is a security researcher and security specialist at [yes.com](http://yes.com/). Before that, he received a PhD in Computer Science from University of Stuttgart, Germany. During his research, he developed new methods to formally analyze the security of web applications and standards. He used these formal methods to find new attack vectors on OAuth, OpenID Connect, and other federated web authentication/authorization systems. His research was published at top-tier academic conferences. He teaches web security concepts since 2009 and is a co-author of the new OAuth Security Best Current Practice RFC.