| Subject | English | Spanish |
| commun., IT | symmetric encryption | cifrado simétrico |
| comp., MS | symmetric encryption | clave de cifrado simétrica (An encryption algorithm that requires the same secret key to be used for both encryption and decryption. Because of its speed, symmetric encryption is typically used when a message sender needs to encrypt large amounts of data) |
| IT | symmetric encryption system | sistema de cifrado simétrico |