| Subject | English | Welsh |
| comp., MS | authentication database | cronfa ddata dilysu (A database on a server that matches user names to passwords) |
| comp., MS | authentication method | modd dilysu (The authentication protocol (such as CHAP, PAP, EAP etc) used when authenticating access to resources on a network) |
| comp., MS | authentication page | tudalen dilysu (A Web page presented to unauthenticated users logging on to a site requiring authentication with a Web browser) |