Sidelink Feedback Sequence Selection Against Spoofed Feedback Attacks
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Solution Overview
Problem
Current wireless communication systems are vulnerable to spoofed feedback attacks, where an eavesdropper can infer the feedback resource and transmit false feedback, leading to unnecessary retransmissions and waste of system resources.
Innovation Solution
The proposed solution involves configuring user equipment (UEs) with multiple feedback sequences, where a key index is used to select the sequences for acknowledgment (ACK) and negative acknowledgment (NAK) feedback, making it difficult for an eavesdropper to recreate and fake the feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback sequences are transmitted without protection, then the feedback channel remains open and accessible, but the system becomes vulnerable to spoofed feedback attacks
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple feedback sequences at the UE before actual feedback transmission. The receiving UE is预先 equipped with a set of possible feedback sequences, and the transmitting UE indicates which sequence to use through SCI. This preliminary configuration ensures that when feedback is transmitted, it follows a predetermined secure pattern that prevents eavesdroppers from easily spoofing the feedback, thus improving reliability while addressing the harmful attack vectors.
Solution Approach 2:
The patent utilizes parameter changes by varying the feedback sequence based on parameters indicated in the SCI (such as source ID, destination ID, or other identifiers). Instead of using a fixed feedback sequence, the system dynamically selects from multiple pre-configured sequences based on these parameters. This parameter-driven sequence selection makes it difficult for eavesdroppers to predict or replicate the correct feedback sequence, thereby preventing spoofed attacks while maintaining reliable feedback transmission.
2Reliability
If multiple feedback sequences are configured, then spoofed feedback attacks are prevented, but the device complexity increases
Solution Approach 1:
The patent reduces device complexity through preliminary action by pre-configuring all possible feedback sequences at the UE before operation. Instead of generating sequences dynamically during feedback transmission (which would require complex real-time computation), the UEs are预先 equipped with a complete set of possible sequences. The transmitting UE simply indicates which pre-configured sequence to use via SCI, and the receiving UE selects from its pre-stored sequences. This approach maintains high security while significantly reducing the computational and management complexity during actual operation.
3Reliability
If feedback sequences are made secure through multiple options, then eavesdroppers cannot easily fake feedback, but the system requires more parameters for sequence selection
Solution Approach 1:
The patent minimizes parameter overhead through preliminary action by pre-establishing the relationship between UEs and feedback sequences. The mapping between UE identifiers (source ID, destination ID) and specific feedback sequences is determined in advance. During actual feedback transmission, the transmitting UE only needs to indicate the selected sequence or use a compact parameter derived from existing identifiers, rather than transmitting extensive sequence configuration data. This approach ensures strong feedback authentication while keeping the additional parameter overhead minimal.
Data Source
AI summary
Certain aspects of the present disclosure provide a method for wireless communication at a first user equipment (UE). The method generally includes receiving, from a second UE, sidelink control information (SCI) scheduling a physical sidelink shared channel (PSSCH), determining a sequence for providing feedback for the PSSCH, from a plurality of possible sequences, based on one or more parameters, and transmitting the sequence via a physical sidelink feedback channel (PSFCH) as feedback for the PSSCH.