| Subject | English | Bulgarian |
| comp., MS | authentication service | услуга за удостоверяване (A service provided by an operating system or underlying subsystem (like Microsoft Internet Information Services) that provides a means to authenticate users, typically using a user name and password. Part of the general security system, authentication services can also be offered at the application layer) |
| IT | European Commission Authentication Service | Система на Европейската комисия за автентификация |
| comp., MS | Multi-Factor Authentication Service | услуга на Multi-Factor Authentication (A service that places an automated phone call, sends a text message, or pushes a notification to the Multi-Factor Authentication app on the user's mobile device and processes the result) |
| comp., MS | Windows Azure Multi-Factor Authentication Service | услуга на Windows Azure Multi-Factor Authentication (A service that places an automated phone call, sends a text message, or pushes a notification to the Multi-Factor Authentication app on the user's mobile device and processes the result) |