DATA SECURITY + DATA PROTECTION (OPERATING SYSTEMS); VERTEILTE DATENBANKEN (COMPUTERSYSTEME); CRYPTOGRAPHY (INFORMATION THEORY); VERTEILTE ANWENDUNGEN + CLOUD COMPUTING + GRID COMPUTING (COMPUTERSYSTEME); DISTRIBUTED APPLICATIONS + CLOUD COMPUTING + GRID COMPUTING (COMPUTER SYSTEMS); KRYPTOGRAPHIE (INFORMATIONSTHEORIE); DISTRIBUTED DATABASES (COMPUTER SYSTEMS); DATENSICHERHEIT + DATENSCHUTZ (BETRIEBSSYSTEME)