Encrypted Reference Signal Authentication Against Rogue Base Stations
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Solution Overview
Problem
Current authentication methods are ineffective against man-in-the-middle attacks, particularly those involving rogue base stations and user equipment that intercept and manipulate communication signals, leading to security breaches and service disruptions.
Innovation Solution
A method involving terminal devices and network devices using encrypted reference signals secured with pilot keys to perform channel estimation, ensuring only authorized devices can accurately represent downlink and uplink channel states, thereby defending against unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional authentication methods are used, then authentication can be performed, but the system is vulnerable to man-in-the-middle attacks
Solution Approach 1:
The patent introduces encrypted reference signals as an intermediary element that mediates between the terminal device and access network device. These signals carry channel state information in encrypted form, allowing legitimate parties to verify authenticity while preventing attackers from intercepting and manipulating authentication data. The encrypted reference signal acts as a trusted mediator that proves the legitimacy of the communication channel.
Solution Approach 2:
The patent changes the parameter of reference signal encryption by applying cryptographic transformations to the reference signals. The terminal device and access network device use encryption algorithms to transform plain reference signals into encrypted forms that contain channel state information but cannot be interpreted or manipulated by unauthorized parties. This parameter change from plain to encrypted state prevents man-in-the-middle attacks.
2Measurement precision
If encrypted reference signals are used for channel estimation, then channel state information can be accurately obtained, but computational complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-encrypting the reference signals before transmission using cryptographic algorithms. The terminal device encrypts the reference signal with a security key before sending it to the access network device. This preliminary encryption step ensures that when the signal is received, the channel estimation can be performed directly on the encrypted signal without requiring additional real-time decryption operations, thus reducing computational complexity during the estimation process.
Data Source
AI summary
This disclosure provides an authentication method and a related apparatus. The method includes: A terminal device receives a first received encrypted reference signal corresponding to a first sent encrypted reference signal that is generated by an access network device using a pilot key and a first reference signal and transmitted through a channel; the terminal device performs channel estimation by using the first received encrypted reference signal and the first sent encrypted reference signal, to obtain downlink channel state information; and the terminal device sends first information to the access network device, where the first information includes the downlink channel state information, to effectively defend against man-in-the-middle attacks.