Biometric Server Hierarchical Encryption Segmentation
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Solution Overview
Problem
Biometric authentication/identification systems experience performance degradation due to unnecessary decryption of all registered biometric information during 1:N comparison processes, as existing standards do not allow hierarchical classification and encryption of biometric data.
Innovation Solution
A server and terminal device system that hierarchically encrypts biometric information into basic and detailed components, allowing only the basic information to be decrypted and compared initially, with detailed information decrypted and matched only when a similarity threshold is met, thereby reducing unnecessary decryption and enhancing processing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all biometric information is decrypted and processed for 1:N comparison, then comprehensive user identification is achieved, but system performance degrades due to unnecessary decryption of all N users' data
Solution Approach 1:
The patent segments biometric information into two distinct parts: basic information (first biometric information) and detailed information (second biometric information). This segmentation allows the system to process only the basic information for initial 1:N comparison to identify candidate users, and then process detailed information only for those candidates. This resolves the contradiction by enabling comprehensive identification through staged processing while avoiding unnecessary decryption of all users' complete biometric data, thus maintaining reliability while improving productivity.
2Reliability
If biometric information is encrypted collectively without hierarchical classification, then security is maintained according to existing standards, but processing efficiency decreases due to unnecessary decryption of all data
Solution Approach 1:
The patent applies segmentation by dividing encrypted biometric information into basic information and detailed information, each encrypted separately. The basic information is encrypted with a first encryption key and the detailed information with a second encryption key. This allows the system to decrypt and process only the basic information for initial comparison, maintaining security through encryption while improving processing efficiency by avoiding unnecessary decryption of detailed information for non-matching users.
Solution Approach 2:
The patent implements preliminary action by performing 1:N comparison using only basic information before proceeding to detailed information processing. This preliminary comparison stage identifies candidate users who match the input biometric data at the basic information level, allowing the system to prepare for subsequent detailed verification only for those candidates. This resolves the contradiction by maintaining security through encrypted storage while improving processing efficiency through staged decryption and comparison.
3Productivity
If basic information and detailed information are processed separately, then processing performance is improved, but system complexity increases due to hierarchical encryption requirements
Solution Approach 1:
The patent segments biometric information into basic information and detailed information with distinct encryption schemes. Basic information is encrypted using a first encryption key while detailed information uses a second encryption key. This segmentation enables separate processing of the two information types, improving processing performance by allowing rapid 1:N comparison on basic information without decrypting detailed information. The complexity increase is managed through structured hierarchical encryption that follows a clear two-stage processing model.
Solution Approach 2:
The patent introduces a hierarchical dimension to biometric information processing by organizing data into two levels: basic information and detailed information. This dimensional organization allows the system to operate at different levels of detail appropriate to different processing stages. The first dimension is the hierarchical level (basic vs. detailed), and the second dimension is the processing stage (1:N comparison vs. 1:1 verification). This resolves the contradiction by improving processing performance through selective processing while managing complexity through structured hierarchical organization.
Data Source
AI summary
Disclosed is a server for performing authentication or identification using biometric information including basic information and detailed information includes a storage for storing basic information and detailed information that are separately encrypted for each of a plurality of users, a communicator for communicating with an external device, and a processor configured to, based on separately encrypted basic information and detailed information being received from an external terminal device through the communicator, performing user authentication or user identification for the received basic information and detailed information by decrypting and comparing the stored encrypted basic information and the received encrypted basic information, and comparing the received detailed information with at least one piece of stored detailed information corresponding to a piece of basic information having a degree of similarity that is higher than or equal to a predetermined value and with the received basic information among the stored basic information.