Encrypted HD Data Transfer for Capacity-Limited Storage
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Solution Overview
Problem
Existing data transfer systems between storage devices, such as hard disk drives and optical disk drives, face issues with down-converting high-definition (HD) data to fit smaller storage capacities, resulting in irreversible loss of original resolution when data is moved and cannot be restored to its original HD format upon return.
Innovation Solution
A data transfer system comprising a compressor, encryptor, and controller that compresses and encrypts data for transfer to a secondary storage device, allowing for later decryption and decompression to restore the original HD data, using a cryptographic key for secure management and erasure processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data is down-converted and transferred to a storage device with smaller capacity, then the data can be stored on the target device, but the original HD data quality is lost and cannot be restored
Solution Approach 1:
The system performs preliminary encryption of the original HD data before down-conversion. The cryptographic key is securely stored on the target optical disk device. This preliminary action ensures that when data is later transferred back, the original HD quality can be reconstructed through decryption, preventing permanent quality loss during the down-conversion process.
2Quantity of substance
If data is transferred from one storage device to another, then storage capacity constraints are resolved, but data security and copyright protection are compromised
Solution Approach 1:
The system introduces encryption as an intermediary layer between the source and target storage devices. The cryptographic key acts as a mediator that controls data accessibility during transfer. This allows data to be moved between devices with varying capacities while maintaining security, as the encrypted data cannot be accessed or copied without the key.
3Quantity of substance
If compressed data is stored on a target device, then storage space is optimized, but the ability to reconstruct original data is lost without additional storage
Solution Approach 1:
The system extracts and separately stores the cryptographic key on the target optical disk device, independent of the compressed data. This extraction ensures that the key is preserved and can be used to reconstruct the original HD data when needed, preventing information loss while maintaining storage efficiency through compression.
Data Source
AI summary
A data transfer system transfers original data from a first data storage device to a second data storage device. The transfer system includes a compressor, an encryptor, and a controller. The compressor receives the original data from the first data storage device, generates compressed data of a smaller size, and passes the compressed data to the second data storage device. The encryptor makes a predetermined cryptographic key and passes the key to the second data storage device. The encryptor also receives the original data from the first data storage device, encrypts the original data with the cryptographic key and then sends the encrypted data back to the first data storage device. The controller controls the compressor and the encryptor and gives the first data storage device a first erase instruction, telling the first data storage device to erase the original data, in accordance with a first transfer command.