"de-personalized" or "anonymized" would both work as valid interpretations in that paragraph, in case that helps you gain understanding while waiting for a reply.

anonymization is a process supposed to protect privacy by removing directly identifying information from a data set, de-anonymization is the reverse process (identifying someone in a dataset with no directly identifying information), proving that anonymization does not work.

For example, let's take phone location records, just look where the phone is every night of the week and where it goes every morning and you have the home and work address of the owner which is more than enough to identify the phone owner in pretty much all cases.

De-anonymising would be detecting/creating a person's identity from sets of "anonymised" information, I'd assume.

D’oh. I meant anonyomized (I would edit comment but can’t).