Dr.-Ing. Torsten Lodderstedt has been working in the identity management space at Deutsche Telekom for the last seven years. In his current position as a Senior Product Owner Identity Management, he leads the development of services enabling login into retail and business digital products. He is also an identity management evangelist within Deutsche Telekom and regularly contributes Deutsche Telekom’s experiences and perspective as a subject-matter expert at standardization bodies and cross-operator initiatives. He is a contributor to the OAuth 2.0 und OpenID Connect specifications and author of the OAuth 2.0 threat model and security considerations. In his previous positions as consultant and IT architect, he helped customers in several domains (public, banking, railway communication, telecommunication) since 1996 to implement highly scalable and secure applications. Torsten Lodderstedt received his Ph.D in computer science from Albert-Ludwigs University in Freiburg. His main areas of expertise include identity management, IT security, software engineering tools and methods as well as software architectures.