Inside the de-anonymization industry, where companies buy pseudonymized datasets with mobile advertising IDs and unmask the identities of people in the datasets (Joseph Cox/VICE)

Joseph Cox / VICE:
Inside the de-anonymization industry, where companies buy pseudonymized datasets with mobile advertising IDs and unmask the identities of people in the datasets  —  Unique IDs linked to phones are supposed to be anonymous.  But there's an entire industry that links them to real people and their address.