This is a collection of articles and professional papers from Cryptologia , a journal which focuses on the history and technology of cryptology. The volume offers personal accounts of crypto personalities, scholarly papers on the origins of cryptology, the inadequacy of cryptanalysis, and much more. Articles from Historica include: the unsolved messages of Pearl Harbor; Roosevelt, MAGIC and ULTRA; and diplomatic cryptanalysis in World War II. Articles from Technologia include: Viet Cong SIGINT and US army COMSEC in Vietnam; a World War II German radio army field cipher and how it was broken; and information on the history of the Siemens and Halske T52 cipher machines.