pseudonymous

Of or pertaining to a pseudonym.

Fictitious.

The abuse of children that goes on under the pseudonymous and euphemistic titles of "intergenerational sex" and "sexual liberation."

That uses a pseudonym.

My angle has been more positivistic, my interest arising not out of the general phenomenon of pseudonymity, but out of particular puzzles posed by particular texts assigned to one pseudonymous writer.

Pertaining to pseudonymization.