Biometric Information Concealing for Replaceable Authentication Keys
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Biometric information cannot be replaced, leading to risks of spoofing and privacy violations, while private keys stored in IC cards are vulnerable to loss or theft, resulting in security deterioration.
Innovation Solution
An information concealing system using pseudo-random numbers to convert and reconfigure biometric information, generating concealment information and enabling secure reconfiguration to reduce leakage risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If biometric information is stored for authentication, then personal authentication can be performed, but information leakage risks increase leading to spoofing and privacy violations
Solution Approach 1:
The authentication system is segmented into multiple independent components: biometric feature extraction, pseudo-random number generation, conversion processing, and concealment information generation. Each component operates independently, so compromise of one does not necessarily compromise the entire system.
Solution Approach 2:
Concealment information acts as an intermediary between the original biometric information and the authentication process. This intermediary layer protects the original biometric data while enabling authentication functionality.
2Reliability
If private keys are stored in IC cards for security, then electronic signature and authentication are enabled, but security deteriorates when IC cards are lost or stolen
Solution Approach 1:
The system transforms the private key from a static value stored in an IC card into a dynamically generated value based on biometric information and pseudo-random numbers. This parameter change makes the key replaceable and non-volatile, eliminating loss or theft vulnerabilities.
Solution Approach 2:
Instead of storing the actual private key, the system stores concealment information that can reproduce the private key when needed. This copying approach allows the private key to be regenerated without physical storage, preventing loss or theft.
3Object-affected harmful factors
If biometric information is converted using pseudo-random numbers, then information leakage risks are reduced, but system complexity increases
Solution Approach 1:
The concealment information generation unit serves multiple functions: it converts biometric information, generates protection against leakage, and enables key reproduction. This multi-functionality reduces the need for separate components, managing system complexity.
Solution Approach 2:
The system uses the user's own biometric information to generate the pseudo-random numbers and concealment information. This self-service approach eliminates the need for external key management infrastructure, simplifying the overall system.
Data Source
AI summary
An information concealing system includes: an information concealing apparatus configured to generate a pseudo-random number, convert first information into first conversion information by using the pseudo-random number, and cause a concealment information generating unit to generate first concealment information capable to reconfigure the first information, based on the first conversion information; and an information reconfiguring apparatus configured to extract information related to a seed from the first concealment information, generate a reconfiguration-side pseudo-random number, based on the information related to the seed, convert input second information into second conversion information by using the reconfiguration-side pseudo-random number, and reconfigure the first information concealed as the first concealment information, based on the second conversion information and the first concealment information.