Secure USB Flash Drive with CPRM Controller
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Solution Overview
Problem
Current digital media download systems using secure digital (SD) cards face issues with usability, high costs, incompatibilities, and consumer confusion due to the need for separate cards and adapters, and limited compatibility with consumer electronic devices.
Innovation Solution
A secure universal serial bus (USB) flash drive with a standard USB connector and modified flash memory controller provides secure storage and digital rights management, enabling seamless integration with existing USB ports and eliminating the need for separate SD cards and adapters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SD cards are used for digital media download and storage, then secure storage and digital rights management are provided, but usability deteriorates and device compatibility is limited
Solution Approach 1:
The patent combines the SD card secure storage functionality with a USB flash drive interface into a single integrated device. The USB flash drive includes an SD card interface and controller that provides SD card-like secure storage capabilities while maintaining a standard USB interface for connectivity, eliminating the need for separate SD cards and adapters.
Solution Approach 2:
The USB flash drive is designed to be universally compatible with both SD card-based systems and standard USB ports. It can function as both an SD card (when inserted into an SD slot) and a standard USB flash drive, providing multi-functionality that resolves the compatibility issue between SD card security and USB convenience.
2Reliability
If SD cards are used for digital media download and storage, then secure storage and digital rights management are provided, but device compatibility is limited
Solution Approach 1:
The USB flash drive is designed to be universally compatible with both SD card-based systems and standard USB ports. It can function as both an SD card (when inserted into an SD slot) and a standard USB flash drive, providing multi-functionality that resolves the compatibility issue between SD card security and USB convenience.
Solution Approach 2:
The USB flash drive acts as an intermediary device that bridges SD card-based secure storage systems and standard USB ports. It includes both an SD card interface and USB interface, allowing data to be transferred between SD card systems and USB-connected devices, thereby expanding compatibility across different device types.
3Reliability
If separate SD cards and adapters are used, then secure storage is provided, but cost increases and consumer confusion occurs
Solution Approach 1:
The patent combines the SD card secure storage functionality with a USB flash drive interface into a single integrated device. The USB flash drive includes an SD card interface and controller that provides SD card-like secure storage capabilities while maintaining a standard USB interface for connectivity, eliminating the need for separate SD cards and adapters.
Solution Approach 2:
The USB flash drive is designed to be universally compatible with both SD card-based systems and standard USB ports. It can function as both an SD card (when inserted into an SD slot) and a standard USB flash drive, providing multi-functionality that resolves the compatibility issue between SD card security and USB convenience.
Data Source
AI summary
A secure USB flash drive employing digital rights management to implement secure digital media storage such as that provided by encrypted storage utilizing content protection for recordable media (CPRM) or the like. Unlike a secure digital card which provides such protection, it does not need an SD card port which is CPRM enabled, or alternatively a reader adapted for use therewith. The form factor can be that of a standard USB flash drive and a standard USB connector is employed making the device and its use familiar and comfortable to the average consumer.