Private queries in location based services: anonymizers are not necessary

  title={Private queries in location based services: anonymizers are not necessary},
  author={Gabriel Ghinita and Panos Kalnis and Ali Khoshgozaran and Cyrus Shahabi and Kian-Lee Tan},
  booktitle={SIGMOD Conference},
Mobile devices equipped with positioning capabilities (e.g., GPS) can ask location-dependent queries to Location Based Services (LBS). To protect privacy, the user location must not be disclosed. Existing solutions utilize a trusted anonymizer between the users and the LBS. This approach has several drawbacks: (i) All users must trust the third party anonymizer, which is a single point of attack. (ii) A large number of cooperating, trustworthy users is needed. (iii) Privacy is guaranteed only… CONTINUE READING
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