| Subject | English | Portuguese |
| IT | known plaintext attack | ataque de texto simples conhecido |
| comp., MS, Braz. | plaintext authentication | autenticação de texto não criptografado (An authentication mechanism that is supported by most browsers, including Internet Explorer, and encodes (but does not encrypt) user name and password data before transmitting it over the network) |
| comp., MS | plaintext authentication | autenticação de texto não encriptado (An authentication mechanism that is supported by most browsers, including Internet Explorer, and encodes (but does not encrypt) user name and password data before transmitting it over the network) |