Wake-Up Receiver Authentication Using Closed-Loop Shift Registers
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Solution Overview
Problem
Current authentication methods in communications networks are not energy-efficient and are vulnerable to unauthorized invocations, such as battery lifetime attacks, due to the need for extra message exchanges and complex computations.
Innovation Solution
The use of closed-loop shift registers for authenticating events by correlating received event signals with output signals, allowing for secure and energy-efficient authentication without additional message exchanges, as the shift registers change for each event signal transmission, making captured signals ineffective for attacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional authentication methods using extra message exchanges and complex computations are used, then authentication security is improved, but energy consumption increases
Solution Approach 1:
The patent extracts the authentication function from complex message exchanges and computations, implementing it instead through a simple correlation process between received event signals and output signals of closed-loop shift registers. This extraction eliminates the need for extra message exchanges and complex computations while maintaining authentication security, thereby reducing energy consumption in network entities with limited power capabilities
Solution Approach 2:
The patent uses closed-loop shift registers to generate output signals that are correlated with received event signals. The shift registers create a simplified copy or representation of the authentication mechanism, replacing complex cryptographic operations with a straightforward signal correlation process that is significantly more energy-efficient while preserving the essential authentication function
2Reliability
If traditional authentication methods with extra message exchanges are used, then authentication reliability is improved, but data traffic increases
Solution Approach 1:
The patent extracts the authentication verification step from the traditional multi-message exchange protocol, implementing it through a direct correlation process between the received event signal and the shift register output. This extraction eliminates the need for additional authentication messages, reducing data traffic while maintaining authentication reliability through the mathematical correlation of signals
3Reliability
If traditional authentication methods with complex computations are used, then authentication security is improved, but device complexity increases
Solution Approach 1:
The patent substitutes complex computational authentication mechanisms with a simpler signal correlation process. Instead of using computationally intensive cryptographic algorithms, the system uses a direct mathematical correlation between received event signals and shift register outputs, replacing complex computation with a more straightforward signal processing operation that maintains security while reducing device complexity
Solution Approach 2:
The patent creates a simplified model of the authentication process using closed-loop shift registers that generate output signals correlated with event signals. This copying approach replaces complex authentication computations with a manageable signal generation and correlation process, reducing the computational burden on network entities while preserving authentication functionality
Data Source
AI summary
A method performed by a first network entity (121, 131) for authenticating an event in a communications network (101, 102, 103, 104) is provided. The first network entity (121, 131) is configured to receive an event signal. The first network entity (121, 131) is also configured to authenticate the event if the received event signal correlates with an 5 output signal of a closed-loop shift register in the first network entity (121,131). Furthermore, the first network entity (121, 131) is configured to trigger a change in the closed-loop shift register in order to obtain a subsequent output signal from the closed-loop shift register. A first network entity (121, 131) for authenticating an event is also provided. Further, a wake-up receiver circuit (1210) comprising the first network entity 10 (121, 131) is provided, as well as, a wireless device (1200) comprising the wake-up receiver circuit (1210). Furthermore, a second network entity (110, 111, 112, 113) and a method therein for authenticating an event in at least one first network entity (121, 131) in a communications network (101, 102, 103, 104) are also provided. Also, a radio base station comprising the second network entity (110, 111, 112, 113) is provided, as well as, 15 computer programs and communications networks.