Cancelable Biometric Template Journaling
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Solution Overview
Problem
Current biometric event journal systems do not record events related to the creation of biometric reference templates after the enrollment process, lacking a process to document changes or modifications to these templates.
Innovation Solution
A system and method for recording the creation of cancelable or revocable biometric reference templates in a biometric event journal, involving a base biometric reference template with a unique identifier, applying a data transform function with a function key value to create cancelable templates, and recording these in a biometric event journal, which can be signed and encrypted for security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If biometric reference templates are created and stored after enrollment, then the system can support template revocation and multiple templates per individual, but the system lacks a process to record and track these template creation events
Solution Approach 1:
The patent extends the biometric event journal schema in advance to include fields for recording template creation events, transformation functions, and function key values. This preliminary structural preparation ensures that when templates are created after enrollment, all relevant information is captured systematically without requiring retroactive modifications to the journaling system.
Solution Approach 2:
The patent introduces a journaling mechanism as an intermediary between the template creation process and the security management system. This intermediary records transformation functions and function key values, enabling tracking and control of template derivations while maintaining the independence of the enrollment and template creation processes.
2Reliability
If multiple cancelable biometric reference templates are created from a base template using transformation functions, then template revocation becomes possible, but the system complexity increases due to managing transformation functions and function key values
Solution Approach 1:
The patent transforms the base biometric reference template into multiple cancelable templates by applying transformation functions with different function key values. This parameter-based approach allows systematic generation of secure template variants without fundamentally changing the core template structure, enabling revocation by simply invalidating specific function key values rather than restructuring the entire system.
3Loss of information
If function key values and transformation functions are stored in the biometric event journal, then complete audit trails are maintained, but the data storage requirements and processing overhead increase
Solution Approach 1:
The patent extracts and stores only the essential elements (transformation function identifiers and function key values) in the biometric event journal, rather than storing complete template data or redundant information. This selective extraction maintains comprehensive audit trails while minimizing storage overhead by recording only the minimal necessary data to track template creation events.
Data Source
AI summary
A system, method and program product for recording the creation of a cancelable biometric reference template in a biometric event journal record. The method includes providing a base biometric reference template having a unique base reference template identifier that uniquely identifies base biometric data collected for an individual, applying a data transform function having a first function key value to the base biometric reference template to create one cancelable biometric reference template and recording the one cancelable biometric reference template in a biometric event journal record. The method further includes creating additional cancelable biometric reference templates using different function key values of the data transform function. The method further includes encrypting the data transform function and the function key value applied to the base biometric reference template. The method further includes signing the cancelable biometric reference template and signing the biometric event journal with a digital signature.