Wireless Device Physical Layer Security Management
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Solution Overview
Problem
Wireless communication systems lack protection for downlink control and data signals, such as MAC signaling and paging information, making them vulnerable to malicious interference or hijacking, as these signals are not typically secured by security functionalities.
Innovation Solution
Implementing signature-based integrity protection and communication privacy for downlink signals by using unique signatures appended to control and data signals, allowing wireless devices to authenticate the origin of received signals and distinguish between genuine and fabricated transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signature-based integrity protection is implemented for downlink signals, then security and authenticity verification are improved, but device complexity and processing overhead increase
Solution Approach 1:
The base station generates and transmits a first signature to the wireless device in advance before the actual downlink data transmission. The wireless device stores this first signature and uses it to generate a second signature for verifying the authenticity of received downlink signals. This preliminary action enables efficient verification without requiring complex real-time cryptographic operations during data reception.
Solution Approach 2:
The wireless device creates a copy of the first signature received from the base station and uses this copied signature to generate the second signature through a cryptographic function. This copying mechanism allows the device to perform verification without needing to access the original signature repeatedly, reducing processing overhead while maintaining security.
2Measurement precision
If signature verification is performed on all downlink signals, then authentication accuracy is improved, but processing time and speed are reduced
Solution Approach 1:
The patent applies signature verification selectively to specific downlink signals that require authentication, such as control signals and data signals, rather than uniformly to all signals. The wireless device generates a second signature and compares it with the third signature in the downlink signal only when verification is necessary, reducing unnecessary processing time while maintaining authentication accuracy for critical signals.
3Reliability
If cryptographic key-based security is applied to all communications, then security is improved, but energy consumption and processing load increase
Solution Approach 1:
The cryptographic key and first signature are established in advance during an initial security setup phase, before actual data transmission begins. This preliminary establishment of security parameters allows the system to use simpler verification operations during subsequent communications, reducing energy consumption compared to performing full cryptographic operations for every transmission.
Solution Approach 2:
The patent uses a disposable signature-based verification mechanism where the second signature is generated and used for a single verification operation, then discarded. This approach consumes less energy than maintaining continuous cryptographic key operations, as the signature generation and comparison are computationally lighter and can be performed efficiently as one-time operations.
Data Source
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AI summary
Various embodiments include methods, components and wireless devices configured to provide physical layer security in a communication system. In various embodiments, a wireless device processor may receive a first signature from a base station. The wireless device processor may determine a second signature based on the first signature. The wireless device processor may receive from the base station a communication that has been modified using a second signature determined by the base station. The wireless device processor may perform a matching operation to determine whether its second signature matches the second signature used to modify the base station communication. The wireless device processor may enable communications with the base station in response to determining that the second signature determined by its processor matches the second signature used to modify the communication.