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by josefx
1754 days ago
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Facebook is doing some great anonymization: > The objection raises that not all computationally possible numbers are indeed assigned. Therefore, the lossy hash refers not to at least 16 numbers but to a maximum of 16 numbers. Furthermore, if additional data is stored along with the lossy hash, the number of individuals represented by the associated phone numbers can be reduced as data subjects not matching this additional data can be excluded. If e.g., so the DE SA, the gender is also stored, it is possible to at least divide these 16 in half. So their hashcodes can be mapped to 16 different users, which can be trivially reduced to a single person if you have any additional information about them. |
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They stated to the merger review committee that the WhatsApp takeover couldn't feasably lead to data sharing with Facebook. And got fined 110m EUR for that, a pittance. You couldn't take out an insurance policy against a successful merger for that money. From [0]:
"When Facebook notified the acquisition of WhatsApp in 2014, it informed the Commission that it would be unable to establish reliable automated matching between Facebook users' accounts and WhatsApp users' accounts. It stated this both in the notification form and in a reply to a request of information from the Commission."
Edit: typo
[0] https://ec.europa.eu/commission/presscorner/detail/en/IP_17_...