| Subject | English | Portuguese |
| comp., MS, Braz. | certification authority hierarchy | hierarquia de autoridade de certificação (A hierarchy in which the roles of the certification authority are separated into one root CA and one or more subordinate CAs) |
| comp., MS | certification authority hierarchy | hierarquia de autoridades de certificação (A hierarchy in which the roles of the certification authority are separated into one root CA and one or more subordinate CAs) |
| comp., MS | certification hierarchy | hierarquia de certificação (A model of trust for certificates in which certification paths are created by means of the establishment of parent-child relationships between certification authorities) |