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EVENT:

A Fuzzy Commitment Approach to Privacy Preserving Behavioral Targeting
Conferences & Talks

Workshop on Security and Privacy aspects of Mobile Environments (SPME 2014)

11 September 2014

 

description

This paper describes a privacy-preserving framework for delivering coupons to users that approximately satisfy a predefined behavioral profile. The framework is designed to be non-interactive, i.e., vendor-side communication occurs only when it pushes coupons out to the users that it regards as potential customers. User privacy is protected by performing all targeting operations on the end-user’s device. The protocol is based on a fuzzy commitment primitive that is realized using error correcting codes. The central idea is that a user is able to extract the coupon if her behavioral profile approximately matches the vendor’s target profile. Unless the coupon is redeemed, the vendor discovers no information about the user’s behavioral profile. The error correction coding framework enforces a natural tradeoff between the privacy of the vendor and the specificity of targeting. In other words, if the vendor wants to target a broad class of potential customers, it must reveal more information about its targeting strategy to ineligible users. Conversely, if the vendor wants to reveal less information about its targeting strategy to ineligible users, then it must target a more focused class of potential customers.
 

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