FRAUD RISK SCORE USING LOCATION INFORMATION WHILE PRESERVING PRIVACY OF THE LOCATION INFORMATION

摘要

Solutions that protect consumer location information yet still enable the use of such location information in the determination of fraud risk scores are provided. Cryptographic techniques of private information retrieval (PIR) and homomorphic encryption are used to protect consumer location information even as it is used to enhance fraud risk scores. PIR is used to enable an issuer to retrieve non-specific location information using a consumer mobile number as the query criterion without needing to share or disclose the mobile number with the service provider. Homomorphic encryption is used to protect location information of mobile consumers, while ensuring card issuers are only able to learn non-specific information about the location of the consumer.