IRD gives thousands of taxpayers' details to social media platforms for ads
Briefly

Inland Revenue generates between 30-50 custom audience lists a month for targeted advertising, using hashed data instead of sharing customer details directly, yet concerns over hashing's effectiveness remain.
The Federal Commission has highlighted that hashing does not ensure data anonymity, emphasizing a 're-identification problem' which leads to the inference that companies often overstate the privacy protections hashing provides.
Read at NZ Herald
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