Data deobfuscation in IBM QRadar is a cryptographic process that reverses data obfuscation. It relies on asymmetric key cryptography, where a public key is used to obfuscate (encrypt) data, and a corresponding private key is used to deobfuscate (decrypt) it. For security, the private key itself is protected by a password. Therefore, to view the original, sensitive data, an administrator must have access to both the specific private key that corresponds to the public key used for obfuscation and the correct password to unlock that private key.

A. Public key and the password for the key that is used to obfuscate data

The public key is used for obfuscation (encryption), not deobfuscation (decryption).

C. Private key and public key that is used to obfuscate data

The public key is not required for the deobfuscation process; only the private key and its password are necessary.

D. Public key and the password for the private key that is used to obfuscate data

The public key cannot deobfuscate data. This is the exclusive function of the corresponding private key.

1. IBM QRadar SIEM Documentation, "Data obfuscation management": "To deobfuscate data, you must have the private key that is associated with the public key that was used to obfuscate the data... To deobfuscate data, you must have the private key and the password for the key." (This statement is found in the QRadar Administration Guide across multiple versions, including 7.5.0).

2. IBM QRadar SIEM Documentation, "Managing data obfuscation keys": "When you create an obfuscation key, you are prompted to enter a password for the private key. The password is used to deobfuscate data." (This section details the key creation process, explicitly linking the password to the private key for deobfuscation purposes).