Memory Controller Charge Equalization for X-Ray Data Security
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Solution Overview
Problem
As data security becomes increasingly important due to the rapid growth of data types and throughput in the Fourth Industrial Revolution, existing memory systems lack effective methods to enhance security by disguising sensitive data, making it difficult to protect against hacking.
Innovation Solution
A memory system that writes dummy data based on the charge amounts of memory cell strings, ensuring the charge amounts of cell strings are identical, thereby making it difficult to infer the presence of sensitive data through X-ray imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dummy data is written to memory cells to enhance security, then data security is improved, but device complexity increases
Solution Approach 1:
The patent changes the charge amount parameter of memory cell strings by writing dummy data to specific cells. The controller calculates the difference between charge amounts of first and second cell strings, then writes dummy data to the second cell string to equalize their charge amounts, thereby enhancing security through parameter modification
Solution Approach 2:
The patent creates a copy of the charge amount distribution pattern by writing dummy data to the second cell string that mirrors the charge amount characteristics of the first cell string, making X-ray images indistinguishable and enhancing security through pattern copying
2Measurement precision
If charge amounts of cell strings are equalized to prevent data inference, then measurement precision of sensitive data is improved, but device complexity increases
Solution Approach 1:
The controller performs feedback operations by first measuring the charge amounts of both cell strings, calculating the difference, and then writing dummy data to the second cell string based on this difference to achieve equalization. This feedback mechanism ensures precise control over the charge amount equality
Solution Approach 2:
The patent performs preliminary measurement of charge amounts before writing dummy data. The controller identifies the current charge amounts of both cell strings and calculates the required dummy data in advance, ensuring that the equalization process achieves the desired measurement precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system significantly enhances data security by making it challenging for unauthorized users to identify sensitive data, as the X-ray images of cell strings with and without dummy data appear identical, thus protecting the actual data values.
Implementation Method 1
the memory controller to identify a current charge amount of a first cell string including at least one of the first memory cells and a current charge amount of a second cell string adjacent to the first cell string
Data Source
AI summary
A memory system is provided. The memory system includes a memory device having a plurality of memory cells; and a memory controller configured to control the memory device to: store write data in first memory cells from among the plurality of memory cells, identify a current charge amount of a first cell string including at least one of the first memory cells and a current charge amount of a second cell string adjacent to the first cell string, and store dummy data in at least one memory cell connected to the first cell string or the second cell string based on the current charge amount of the first cell string and the current charge amount of the second cell string.