Benutzerbezogene Datensicherheit in Kommunikationssystemen. - Ulrich Kohl (VDI-Verlag, 1996)

User-Oriented Control of Personal Information Security in Communication Systems. - Ulrich Kohl (Personal Medical Information, 1997)

Cryptographic Containers and the Digital Library. - Jeffrey B. Lotspiech; Ulrich Kohl; Marc A. Kaplan (Verläßliche IT-Systeme, 1997)

Safeguarding Digital Library Contents and Users: Protecting Documents Rather Than Channels. - Ulrich Kohl; Jeffrey B. Lotspiech; Marc A. Kaplan (D Lib Mag., 1997)

Security for the Digital Library - Protecting Documents Rather than Channels. - Ulrich Kohl; Jeffrey B. Lotspiech; Stefan Nusser (DEXA Workshop, 1998)