The plan would have seen health organizations hand over patient information with key details, such as the patient’s name, obscured. This information would have been matched with the patient’s Facebook records to see if there is any information in there that could help treatment—for example, if an elderly patient doesn’t seem to have many friends, they may require more at-home care following surgery.
According to the report, the matching would have been achieved through a technique called “hashing.” This essentially means using an algorithm to scramble a piece of data, such as a name, in a way that means no one can unscramble it—but if another piece of data is run through the same algorithm and you end up with the same garbled code, then the two pieces of original data must match. This is a “pseudonymization” rather than an anonymization technique, as it does leave data open to re-identification.
Als men dus de medische data kan matchen met een FB profiel en men weet van wie dat FB profiel is dan is er geen medisch geheim meer me dunkt ….