In this particular example, they produced a random number which use the real id[0] as a seed, then mixed the result with the original id. It was not enough, an

In this particular example, they produced a random number which use the real id[0] as a seed, then mixed the result with the original id. It was not enough, and, as Teague et al note: > Indeed, encryption was not necessary – a randomly chosen unique number for each person would have worked. Scroll down from here: https://www.oaic.gov.au/privacy/privacy-decisions/investigation-reports/mbspbs-data-publication/#information-about-medicare-service-providers https://www.oaic.gov.au/privacy/privacy-decisions/investigat... [0] The data had ids for providers (e.g. doctors) as well as patients.