For years, companies and institutions have been using “anonymization” or “deidentification” techniques and processes to release data concerning individuals, saying that the techniques will protect personal privacy and preclude the sensitive information from being linked back to an individual. Yet we have seen time and again that these processes haven’t worked.
For almost two decades, researchers have told us that anonymization of private information has significant problems, and individuals can be re-identified and have their privacy breached. (I wrote a blog post last year detailing some of the research concerning re-identificaiton of anonymized data sets.)
Recently, Australian Attorney General George Brandis announced that he would seek to amend the country’s Privacy Act to “create a new criminal offence of re-identifying de-identified government data. It will also be an offence to counsel, procure, facilitate, or encourage anyone to do this, and to publish or communicate any re-identified dataset.”
According to the Guardian, the “impetus” for this announcement was a recent privacy problem with deidentified Medicare data, a problem uncovered by researchers. “A copy of an article published by the researchers outlines how every single Medicare data code was able to be reidentified by linking the dataset with other available information,” the Guardian reported. Read more »