tomayac’s Twitter Archive—№ 11,127

How “shadow” info (someone else uploading their address book to a social networking site _without_ your consent, or you providing your phone number_purely_ for 2-factor authentication) can be used by advertisers: gizmodo.com/facebook-is-giving-advertisers-access-to-your-shadow-co-1828476051 (Paper: mislove.org/publications/PII-PETS.pdf) #Privacy