Hash Chaining for V2X Message Verification
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Solution Overview
Problem
In Intelligent Transportation Systems (ITS), Vehicular-to-Everything (V2X) communications face challenges in verifying thousands of messages per second within tight timing constraints, leading to high computational overhead and potential delays in processing critical safety messages.
Innovation Solution
Implementing a hash chaining mechanism that allows each signed message to carry the hash value of its predecessor, enabling the verification of a sequence of messages from the same source with a single signature verification, thereby reducing the number of required signature verifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional signature verification is performed for each V2X message individually, then message authentication security is ensured, but computational overhead increases and verification speed decreases
Solution Approach 1:
The patent combines multiple individual signature verifications into a single batch verification process. By collecting multiple V2X messages and verifying their signatures collectively using batch verification algorithms, the system maintains the same security level as individual verification while reducing the total number of cryptographic operations required, thereby improving verification speed and reducing computational overhead.
Solution Approach 2:
The patent performs preliminary actions by pre-processing and collecting multiple messages before executing the verification operation. Messages are gathered in batches and prepared for collective verification, allowing the system to amortize the computational cost across multiple messages rather than performing separate verification operations for each message individually.
2Reliability
If signature verification is performed for every incoming V2X message, then message authenticity is guaranteed, but processing delays occur due to computational overhead
Solution Approach 1:
The patent merges multiple verification operations into a single batch process, maintaining message authenticity guarantees while reducing the time required for verification. The batch verification approach processes multiple messages simultaneously, eliminating the sequential delay that would occur with individual verifications.
Solution Approach 2:
The system performs preliminary message collection and batch formation before verification, allowing multiple messages to be processed together. This pre-processing step reduces the overall processing delay by preparing messages for efficient batch verification rather than verifying each message as it arrives.
3Measurement precision
If computational resources are allocated for verifying each message signature individually, then verification accuracy is maintained, but system resource consumption increases
Solution Approach 1:
The patent merges multiple signature verification operations into a single batch verification process, maintaining verification accuracy through cryptographic soundness while reducing total computational resource consumption. The batch verification algorithm achieves the same level of accuracy as individual verification but with fewer overall computational operations required.
Data Source
AI summary
According to some embodiments, in a Vehicular-to-Everything (V2X) communications environment where vehicles can exchange messages with other entities, including nearby vehicles and pedestrians, systems and methods are provided to implement a mechanism or technique based on hash chaining that allows a large sequence of messages from the same source to be validated by verifying a single digital signature.