| Subject | English | German |
| comp., MS | Public Key Infrastructure certificate | Public Key-Infrastrukturzertifikat (A system of digital certificates, certification authorities, and other registration authorities that verify and authenticate the validity of each party involved in an electronic transaction) |
| comp., MS | public key infrastructure hierarchy | Hierarchie der Public Key-Infrastruktur (A hierarchy in which the roles of the certification authority are separated into one root CA and one or more subordinate CAs) |