Wireless Data Prefetching With Cached Fragments for Secure Vehicle Delivery
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Solution Overview
Problem
Connected vehicles face challenges in obtaining desired data over fluctuating wireless connectivity while ensuring data security from potential eavesdroppers.
Innovation Solution
A system for secure wireless data prefetching and delivery, where a central agent receives demands from vehicles, generates a function to allow vehicles to generate missing data components using cached portions and keys, and broadcasts this function to the vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data is transmitted over wireless networks to moving vehicles, then data delivery is achieved, but data security is compromised due to potential eavesdropping
Solution Approach 1:
The patent segments complete data files into multiple distinct portions and distributes them across different vehicles. Each vehicle receives only a specific segment (e.g., first portion, second portion) rather than the complete file, making intercepted segments useless without the corresponding key and other segments held by authorized vehicles.
Solution Approach 2:
The patent introduces cryptographic keys as an intermediary mechanism between the data segments and the authorized vehicles. The key acts as a mediator that enables authorized vehicles to reconstruct complete data files from their cached portions, while preventing unauthorized access even if data segments are intercepted during transmission.
2Reliability
If complete data files are transmitted to vehicles, then data availability is improved, but network bandwidth consumption increases
Solution Approach 1:
The patent divides complete data files into multiple smaller portions and caches them distributed across different vehicles. This segmentation allows the system to serve multiple vehicles with partial data already stored locally, reducing the need for complete file transmissions and optimizing network bandwidth utilization.
Solution Approach 2:
The patent performs preliminary action by pre-caching data portions in vehicles before they are needed. Vehicles receive and store specific portions of data files in advance during periods when network conditions are favorable, so that when data is needed, the portions are already available locally or can be efficiently reconstructed using the function and key.
3Speed
If data is cached in vehicles, then data access speed is improved, but data security risks increase from local storage
Solution Approach 1:
The patent segments complete data files into multiple portions and distributes them across different vehicles. Each vehicle stores only a fragment (e.g., first portion, second portion) rather than the complete file, so that even if a vehicle is compromised, the attacker obtains only a useless segment without the key or other segments needed for reconstruction.
Solution Approach 2:
The patent uses cryptographic keys as an intermediary that protects cached data portions. The key is required to reconstruct complete data files from the cached portions, creating a security barrier that prevents unauthorized access even when data is stored locally in vehicles.
Data Source
AI summary
Secure wireless data prefetching and delivery is provided. A first demand is received from a first requesting device, requesting a first data file from the central agent, the first requesting device storing first cache data including a key and a first portion of the first data file. A second demand is received from a second requesting device, requesting a second data file from the central agent, the second requesting device storing second cache data including the key and a second portion of the second data file. A function is generated configured to allow the first requesting device to generate the first data file from the first portion and to allow the second requesting device to generate the second data file from the second portion. The function is broadcast to the first and second devices, responsive to the first and second demands.