zlacker

I would suggest "denonymization", implying that the "names" (i.e. identifiable information) were removed. As opposed to anonymous data, which presumably never had any to start with, like the example mentioned by the GP.

>>Berisl+(OP)
from an etymological perspective, this is kind of gross; you are grafting a latin-derived prefix onto a greek-derived stem. there's no direct Greek equivalent to the Latin "de", but you could consider "apo" or possibly "kata", both of which have similar meanings.

>>Berisl+(OP)
> I would suggest "denonymization"

Very very close to the existing "deanonymization" which is essentially the opposite.