| Subject | English | Spanish |
| IT | private cryptographic signature key | clave de firma criptográfica privada |
| commun., IT | private key | clave privada |
| commun., IT | private key | clave secreta |
| comp., MS | private key | clave privada (The secret half of a cryptographic key pair that is used with a public key algorithm. Private keys are typically used to decrypt a symmetric session key, digitally sign data, or decrypt data that has been encrypted with the corresponding public key) |
| gen. | private key data confidentiality | cifrado de datos con clave secreta |