| Subject | English | Polish |
| comp., MS | Public Key Infrastructure certificate | Certyfikat infrastruktury kluczy publicznych (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 | hierarchia infrastruktury kluczy publicznych (A hierarchy in which the roles of the certification authority are separated into one root CA and one or more subordinate CAs) |