Dynamic Biometric Digital Signature Generation
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Solution Overview
Problem
Existing digital signature methods are vulnerable to reuse and copying, allowing fraudulent individuals to impersonate the original signer by using a static signature that does not change over time.
Innovation Solution
A method and system that generate a unique digital signature for each time interval by utilizing a combination of biometric features, increasing the number of possible signatures through the use of multiple biometric features and their subdivisions, ensuring the signature is specific to a short time frame, thereby preventing reuse and ensuring indisputable sender identity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a static biometric signature is used for digital signing, then the signature is simple to generate and verify, but the signature can be copied and reused by fraudulent persons
Solution Approach 1:
The patent applies dynamics by making the signature variable over time. Instead of a static signature, the system generates different signature values for each time interval using the formula S(ti) = f(B1, B2, ..., Bn, ti), where ti represents the time interval. This dynamic approach ensures that even if someone captures a signature, it cannot be reused because the signature value changes with each time interval.
Solution Approach 2:
The patent changes the parameter of time in the signature generation function. By incorporating time interval ti as a variable parameter in the signature formula, the system ensures that signatures are unique to specific time periods. This parameter change transforms the signature from a static value to a time-dependent value, preventing copying and reuse.
2Reliability
If multiple biometric features and their subdivisions are used to increase the number of possible signatures, then the security against fraud is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing biometric features into multiple subdivisions. Instead of using a single biometric feature, the system uses multiple biometric features (B1, B2, ..., Bn) and can further subdivide them, creating many possible signature combinations. This segmentation increases the security space without requiring fundamentally new technology.
Solution Approach 2:
The patent achieves multi-functionality by using a single signature generation device that can incorporate multiple types of biometric features (fingerprints, iris, voice, etc.) and their subdivisions. The universal formula S(ti) = f(B1, B2, ..., Bn, ti) can handle various biometric input types, reducing the need for separate systems for different security levels.
3Reliability
If the signature is linked to a short time interval, then the signature cannot be reused outside that interval, but the verification process becomes more complex
Solution Approach 1:
The patent uses parameter changes by incorporating time interval ti as a critical parameter in the signature formula. The signature S(ti) is valid only for its specific time interval, and verification involves checking both the signature value and the time parameter. This approach provides automatic expiration control without requiring complex external validation systems.
Data Source
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AI summary
The present invention provides a system and a method for generating digital signatures. The system comprises a first formula which generates the signature as selected series from at least two, but preferably more digitized biometric features of a user. The signature comprises a different selected series per unit of time of for instance 10 seconds. The invention comprises a second formula which assigns a numerical value to a data file. The second formula can also use the numerical value to define another time interval, on the basis of which another signature can be generated. The invention further provides a number of examples for application of the generated signature during the sending of data files.