Biographical sketches of authors

Ernst-Michael (Mike) Hamann   IBM Pervasive Computing Division, Schoenaicher Strasse 220, 71032 Boeblingen, Germany (electronic mail: mhamann@de.ibm.com). Mr. Hamann is a consultant solutions architect in the Pervasive Computing Division. He is responsible for digital signature solutions using public key techniques. He developed the architecture of IBM's Digital Signature for the Internet (DSI) solution using PKI smart cards. He is currently specializing in the security components of the Wireless Application Protocol (WAP) and represents IBM at the WAP Forum's Security Group (WSG). He has worked in the development laboratories of IBM for the last 33 years in various positions in software and hardware development. During this time he developed IT solutions in a wide range from large hosts (System/390^®) and networking products (IBM 3270, IBM Token Ring, Systems Network Architecture) to smart cards and mobile equipment. Mr. Hamann received an engineering degree (Diplom Ingenieur) in applied physics from the PTL Wedel/Hamburg, Germany, in 1968. He holds several patent submissions in the area of IT security components.

Horst Henn   IBM Pervasive Computing Division, Schoenaicher Strasse 220, 71032 Boeblingen, Germany (electronic mail: hhenn@de.ibm.com). Dr. Henn is lead consultant in the Pervasive Computing Division. He received his diploma in computer science and his Ph.D. in electrical engineering from the University of Stuttgart. He joined IBM in 1975, working on design software development for System/370™ and 801 system development. He managed a series of hardware, software, and system design projects in the areas of System/390 CMOS sysplex, communication adapters, image processing, and neural-network-based signature validation, as well as the initial development of the IBM MFC smart card. Dr. Henn was involved in standardization activities for PC/SC, OCF, Java Card, and G8 health card. In his current position he is working with development teams and customers to create first-of-a-kind multimode portal systems. He has published a series of papers and filed many patents.

Thomas Schäck   IBM Pervasive Computing Division, Schoenaicher Strasse 220, 71032 Boeblingen, Germany (electronic mail: schaeck@de.ibm.com). Mr. Schäck is an architect in the Pervasive Computing Division. He started working for IBM in 1996 after obtaining his diploma in computer sciences from the University of Karlsruhe. After joining IBM, he worked in Java and C++ development projects centered on the smart card technology. These projects include the OpenCard Framework that became the standard API for smart card applications in Java, payments via the Internet, and work on a PKCS #11-based digital signature solution. He was the architect of a first-of-a-kind e-business project for a large German bank and is now working as a portal architect in the Pervasive Computing Division. He has published various papers in his field and filed numerous patents. His prior publications include the book Smart Card Application Development Using Java.

Frank Seliger   IBM Pervasive Computing Division, Schoenaicher Strasse 220, 71032 Boeblingen, Germany (electronic mail: seliger@de.ibm.com). Mr. Seliger is currently a security architect in the Pervasive Computing Division. In 1978, he joined IBM, where he has been active in various areas of software and firmware development. His latest focus has been on object-oriented software development and on security technology. Since 1990, he has worked on a C++ collection class library, on a Java framework for smart card applications, as consultant in the IBM Object Oriented Technology Center, and as architect in various applications of mobile computing. With his colleagues he captured his experience in Developing Object-Oriented Software—An Experience-Based Approach, published by Prentice Hall in 1997, and in Smart Card Application Development Using Java, published by Springer-Verlag in 1999.