Secure RDMA Packet Authentication for Vehicle Control Networks
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Solution Overview
Problem
RDMA technology, while efficient in trusted environments, lacks security mechanisms necessary for safety-critical applications like automotive systems, exposing them to vulnerabilities such as unauthorized data injection and Denial-of-Service attacks.
Innovation Solution
Implementing message authentication codes (MAC) in RDMA packets, using shared MAC keys for authentication, and integrating hardware security peripherals to enforce access control and prevent DOS attacks, while maintaining low latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RDMA is implemented without security mechanisms to maintain efficiency, then communication latency is reduced and processor load is minimized, but security vulnerabilities such as unauthorized data injection and Denial-of-Service attacks increase
Solution Approach 1:
A hardware security peripheral is introduced as an intermediary component between the RDMA network interface and the CPU. This peripheral handles security operations (MAC calculation, packet validation) independently, preventing security mechanisms from becoming a bottleneck for performance while ensuring robust security coverage.
Solution Approach 2:
The patent replaces software-based security processing with hardware-based security peripherals. By moving security functions from the software stack to dedicated hardware circuits, the system achieves both high performance (minimal CPU overhead) and strong security without adding significant system complexity.
2Reliability
If message authentication codes are added to RDMA packets to ensure data integrity, then security against unauthorized access is improved, but packet processing time and network overhead increase
Solution Approach 1:
The hardware security peripheral performs MAC calculation and packet validation autonomously without requiring CPU intervention. The system is designed so that security operations are self-contained in the hardware peripheral, eliminating the time overhead that would otherwise be incurred by CPU-based processing.
Solution Approach 2:
By replacing software-based MAC verification with hardware-based validation circuits, the patent achieves constant-time packet processing regardless of packet size or content. This hardware substitution eliminates variable processing delays while maintaining comprehensive data integrity checking.
3Reliability
If hardware security peripherals are integrated into RDMA network interfaces to enforce access control, then Denial-of-Service prevention is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The security peripheral is merged with the existing RDMA network interface controller, sharing common resources such as memory buffers, interrupt controllers, and physical connectivity. This integration approach provides robust DoS prevention capabilities while minimizing the actual increase in device complexity by leveraging existing hardware infrastructure.
Solution Approach 2:
The hardware security peripheral is designed to serve multiple functions: MAC verification, access control list enforcement, rate limiting, and DoS detection. By making the security hardware multi-functional, the patent reduces the need for separate dedicated components for each security feature, thereby limiting the overall increase in device complexity.
Data Source
AI summary
A vehicle network communications system including a sending processor for generating a data in response to a first vehicle control algorithm, a sending network interface configured to receive the data from the sending processor, to generate a message authentication code in response to the data, to generate a communications packet for transmission according to a remote direct memory access network protocol, wherein the message authentication code is appended to the communications packet, and to transmit the communications packet via a communications network, a receiving network interface configured to receive the communications packet from the sending network interface via the communications network, to decode the message authentication code to extract the data, and to couple the data the memory, and a memory configured to store the data for use by a receiving processor performing a second vehicle control algorithm.