[TadaScientist]

Pseudo and psuedo are derived from the greek work ψεμα psema, which literally means lie. It's synonym is 'untrue' which indicates that your term is the right term to use when anonymizing-but-not-really-anonymizing

[contravariant]

In this case it might not be 'pseudo'-anonymization but rather 'pseudonym'-ization. At least that seemed to be the intent when I last heard the term.