Secured Data Recording Using Dual Memory and Hash Verification
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Solution Overview
Problem
The existing systems for data recording in devices like computers and mobile phones face challenges in securely storing large volumes of sensitive data due to limited secured memory space, necessitating a solution that ensures data integrity and confidentiality while optimizing memory usage.
Innovation Solution
A method involving a dual-memory system, where sensitive data are encrypted and stored in a non-secured memory, with a derived key generated from a root key stored in a secured memory, allowing for secure access and integrity verification without compromising confidentiality, and optimizing memory usage by removing data from the secured memory after encryption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data are stored in secured memory to ensure confidentiality, then data security is improved, but secured memory space is consumed
Solution Approach 1:
The patent extracts sensitive data from secured memory after encryption and stores only encrypted data in non-secured memory. The root key remains in secured memory, but the actual sensitive data are removed, freeing up secured memory space while maintaining security through encryption and integrity verification mechanisms
Solution Approach 2:
The patent creates encrypted copies of sensitive data and stores them in non-secured memory. The original data remain in secured memory initially, but after verification, the secured memory can be cleared since the encrypted copy with integrity protection serves as the secure storage medium
2Reliability
If hash verification mechanisms are implemented, then data integrity is improved, but system complexity increases
Solution Approach 1:
The patent computes and stores hash values of sensitive data before encryption and storage. This preliminary action creates a verification mechanism that can later confirm data integrity without requiring complex real-time monitoring systems
Solution Approach 2:
The patent introduces hash values as an intermediary element that mediates between the sensitive data and the verification process. The hash acts as a simple mathematical representation that can be easily computed and compared, avoiding the need for complex verification systems
Data Source
AI summary
A method for the secured recording of data, implemented in a data-recording device having a first non-secured memory and a second secured memory, is disclosed. The method has the steps of: obtaining a derived key corresponding to the data in the second memory from a root key recorded in the second memory; encrypting data using the derived key, delivering encrypted data; recording the encrypted data in the first memory; determining a hash imprint of said data; recording said hash imprint in a hash file recorded in the first memory; recording a general hash imprint, representing the content of the hash file comprising said hash imprint, in the second memory; and eliminating the data in the second memory.