Privacy Control System for Location Data Recovery
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Solution Overview
Problem
Existing privacy protection techniques for sensitive user information, such as location data, fail to allow for the full recovery of original data while maintaining privacy, which is crucial for legal purposes, infectious disease prevention, and life-saving situations.
Innovation Solution
A method and system that perform privacy protection processing by adjusting the privacy level of sensitive information based on the requested service, and generate a secret key to recover the privacy-protected sensitive information, ensuring that the information can be restored to its original accuracy when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If spatial obfuscation technique is used to protect user privacy by adjusting accuracy of location information, then privacy protection is improved, but the ability to recover original location data is lost
Solution Approach 1:
The patent segments location information into multiple precision levels, where coarse-grained location data is provided to services for privacy protection, while fine-grained original data is preserved separately and can be recovered when needed through key exchange between user and service provider
Solution Approach 2:
The patent changes the precision parameter of location information dynamically based on service requirements and user consent, allowing the same location data to be presented at different accuracy levels (e.g., city-level, district-level, street-level) without losing the original high-precision information
2Object-affected harmful factors
If encryption technique is used to encrypt entire location information, then privacy protection is improved, but service providers cannot use location data for service delivery
Solution Approach 1:
The patent extracts only the necessary portion of location information (coarse-grained data) from the complete location data and provides it to service providers, while the sensitive fine-grained original data remains protected and can be selectively disclosed when service requirements justify it
Solution Approach 2:
The patent implements dynamic privacy control where the level of location information disclosure changes based on service context, user preferences, and consent decisions, allowing flexible balancing between privacy protection and service functionality rather than static encryption
3Object-affected harmful factors
If spatial obfuscation adds noise to location information, then privacy protection is improved, but data accuracy is degraded
Solution Approach 1:
The patent performs preliminary privacy protection by providing obfuscated location data to services in advance, while maintaining the capability to recover or upgrade precision later when legitimate needs arise, such as for emergency services or law enforcement with proper authorization
Data Source
AI summary
A method for protecting the privacy of personal location information by level of sensitivity and efficiently recovering a source location is disclosed. The sensitive information protection and recovery method performed by means of a privacy control system, according to one embodiment, may comprise the steps of: processing privacy protection for sensitive information of a user, adjusted on the basis of privacy level selected according to a service by which the sensitive information was requested; and recovering the privacy-protected sensitive information of the user by using a secret key generated on the basis of the sensitive information of the user, adjusted on the basis of the privacy level.