| Subject | English | Spanish |
| comp., MS | Public Key Infrastructure certificate 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 | certificado PKI (infraestructura de clave pública) |
| comp., MS | public key infrastructure hierarchy | jerarquía de infraestructura de clave pública (A hierarchy in which the roles of the certification authority are separated into one root CA and one or more subordinate CAs) |