Wireless Signal Power Slope Authentication for Anti-Spoofing
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Solution Overview
Problem
Existing physical layer authentication technologies in wireless communications, such as Auth-SS and Auth-TDM, expose authentication information, making them vulnerable to interference, replay, and spoofing attacks, which threaten the security of information transmission.
Innovation Solution
The Slope Authentication (Auth-SLO) method divides signals into packets and adjusts power using pre-agreed key-based power parameter adjustment factors, allowing the receiving device to authenticate signals without revealing power modification positions to hostile users, thereby enhancing security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If authentication information is included in the signal (Auth-SS, Auth-TDM, Auth-SUP), then authentication capability is achieved, but security is worsened due to exposure to hostile users
Solution Approach 1:
The patent extracts authentication capability from explicit authentication information and embeds it in the power parameter characteristics of the signal. Instead of including separate authentication tags or codes, the authentication information is embedded in the power distribution pattern across signal packets, making it inseparable from the signal itself and invisible to hostile users.
Solution Approach 2:
The patent changes the authentication approach from information-based to parameter-based authentication. By using power parameter adjustment factors that modify the power distribution of signal packets according to pre-agreed keys, the system embeds authentication in physical layer parameters rather than information layer, making it resistant to traditional attacks.
2Object-affected harmful factors
If power parameter adjustment factors are used for authentication, then security is improved by hiding modification positions, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-agreeding power parameter adjustment factors between communicating devices before actual communication. These pre-established factors are used during signal transmission to modify power parameters, eliminating the need for real-time complex calculations and reducing operational complexity while maintaining security.
3Reliability
If signal power is adjusted for authentication, then authentication security is enhanced, but signal integrity requirements become more stringent
Solution Approach 1:
The patent changes the approach by using relative power parameter relationships rather than absolute power values. The authentication relies on the proportional relationships between power parameters of different packets, which are determined by pre-agreed factors, reducing the stringency of absolute power control precision requirements.
Data Source
AI summary
A wireless communication method and device include: a transmitting device dividing a to-be-transmitted signal into a plurality of packets by using a pre-agreed key; acquiring a preset equivocation threshold; according to the equivocation threshold, determining a power parameter adjustment factor for each of the packets; for each of the packets, performing power adjustment on a signal of the packet according to a power parameter adjustment factor of the packet; and transmitting the to-be-transmitted signal after power adjustment. After receiving the signal, the receiving device groups the signals according to the pre-agreed key, and calculates the power of each packet; determines a test statistic according to the power of each packet, and determines the test statistic whether the quantity is greater than or equal to a preset statistic threshold. If so, it determines that the signal is a tag signal, and if not, that it is a regular signal.