Secure Register Unit Hash-Based Lookup Service
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Solution Overview
Problem
Existing electronic token transaction systems face challenges in ensuring the security and privacy of user information while maintaining the integrity and confidentiality of token transactions, particularly in preventing attacks like double-spending and fraud, especially when storing and exchanging digital assets like central bank digital currencies (CBDCs).
Innovation Solution
A secure register unit is introduced that uses cryptographic hash functions to transform user information into hash values, which are then linked to secure token transaction unit identifiers, ensuring that only hash values are stored and transmitted, thus protecting user information from disclosure even if the system is compromised. This unit includes input means for receiving hash values, storage for linking hash values to secure token transaction unit identifiers, and output means for sending these identifiers upon request, ensuring that no plaintext user information is stored.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If user information is stored in plaintext for lookup services, then ease of operation is improved, but security and privacy are worsened
Solution Approach 1:
The patent transforms user information from plaintext to hash values through cryptographic hashing, changing the data format parameter. This allows the lookup service to operate on hash values instead of plaintext, maintaining functionality while eliminating the security vulnerability of storing sensitive information in readable form.
Solution Approach 2:
The patent introduces hash values as an intermediary between user information and the lookup service. Instead of directly storing and querying plaintext user information, the system uses hash values as a mediator that preserves the ability to perform lookups while preventing direct access to the original sensitive data.
2Object-affected harmful factors
If hash values are used instead of plaintext user information, then security is improved, but measurement precision is worsened
Solution Approach 1:
The patent creates a cryptographic copy (hash value) of the user information that preserves the essential identifying characteristics needed for lookups while eliminating the security risks of the original plaintext. The hash function ensures that the same input always produces the same output, maintaining retrieval accuracy while enhancing security.
Data Source
AI summary
A secure register unit within an electronic token transaction system includes input means configured to receive a hash value based on user information; storage means configured to store a link between the received hash value and a secure token transaction unit identifier of a secure token transaction unit of the user. The storage means is configured to store a plurality of the links, and the output means is configured to send the secure token transaction unit identifier upon request from any secure token transaction unit of the electronic token transaction system to the requesting secure token transaction unit. A secure transaction unit, an electronic token transaction system, or a method for providing a lookup service may employ any of the features of the secure register unit.