RFID Tag Authentication via Centralized Linker and Hashing
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Solution Overview
Problem
Existing RFID systems face challenges with high costs, complexity, insufficient on-tag storage, privacy concerns, and vulnerability to unauthorized data access and counterfeiting, which hinder their adoption in large-scale item-level tagging.
Innovation Solution
An RFID system that includes a tag with a unique ID and hidden code, a reader, and a store that uses master control and hidden codes for authentication, allowing secure data access and reducing the need for extensive on-tag storage by using a linker to manage links and data objects centrally, while maintaining flexibility and timeliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If RFID tags store extensive data locally, then data access is faster and more independent, but tag complexity and cost increase significantly
Solution Approach 1:
The patent extracts the data storage function from the RFID tag and places it in an external database. The tag only retains minimal identification data, while comprehensive product information is stored externally and accessed via network connections, thereby reducing tag complexity and cost while maintaining data access capability
Solution Approach 2:
The patent introduces a network and database as intermediaries between the RFID tag and the data. Instead of direct local storage in the tag, data is retrieved through the network infrastructure, allowing the tag to remain simple while still providing fast data access through efficient query mechanisms
2Ease of manufacture
If RFID tags use unique identifiers, then tagging is simplified, but privacy and security vulnerabilities increase
Solution Approach 1:
The patent uses cryptographic hashing to create a pseudonymous copy of the identifier. Instead of storing or transmitting the actual unique ID, the system stores and transmits a hash value that serves as a surrogate, maintaining the simplicity of unique identification while eliminating privacy and security vulnerabilities
Solution Approach 2:
The patent introduces cryptographic functions as intermediaries between the unique identifier and the data access process. The hash function acts as a mediator that transforms the unique ID into a pseudonymous form, allowing the system to maintain tagging simplicity while adding layers of privacy and security protection
3Adaptability or versatility
If distributed RFID systems are implemented, then system autonomy increases, but system complexity and maintenance difficulty increase
Solution Approach 1:
The patent merges the data storage and management functions into a centralized database while keeping the RFID tagging function distributed. This hybrid approach maintains system autonomy at the tag level while consolidating complexity into a manageable central repository, reducing overall system complexity and maintenance difficulty
Solution Approach 2:
The patent segments the RFID system into distinct functional components: simple distributed tags for identification, network infrastructure for communication, and a centralized database for data management. This segmentation allows each component to be optimized independently, reducing overall system complexity while maintaining autonomy where needed
Data Source
AI summary
In an RFID system, a method and apparatus for linking an RFID tag to an associated object. The system includes a relatively simple tag, a reader, a linker, and a store. The reader interrogates the tag for an ID and selectively provides the ID to the linker. The linker, in turn, uses the ID to provide back to the reader an associated Uniform Resource Identifier (“URI”). The reader then forwards the URI to the store. In response, the store returns to the reader the object associated with the ID via the URI. The disclosed method and apparatus provide more efficient and secure tag authentication.