| Subject | English | Bulgarian |
| comp., MS | certificate authentication | удостоверяване на сертификат (A form of IIS authentication in which IIS accepts client-certificates used to prove the client's identity. Using this form of authentication, IIS can optionally map a client certificate to a Windows user account by using an internal mapping table or Active Directory) |
| law | notarial authentication certificate | нотариално удостоверение за автентичност (алешаBG) |
| commun., IT | qualified certificate for website authentication | квалифицирано удостоверение за автентичност на уебсайт |