I’m glad it wasn’t a worse injury.
Arvind Narayanan
@random_walker
·
9h
Facebook asks users to add their phone numbers for 2-factor authentication, then misuses that info to target ads. Researchers at Northeastern uncovered this by signing up as an advertiser and finding many clever tricks to reverse-engineer FB’s targeting. (link: https://mislove.org/publications/PII-PETS.pdf) mislove.org/publications/P