System Information Block Freshness Windows for Replay Mitigation
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively preventing replay attacks on system information blocks (SIBs) due to the lack of efficient freshness mechanisms, which can lead to security vulnerabilities.
Innovation Solution
Implementing a freshness window for system information blocks and signatures with a duration shorter than the modification period, tailored to prevent replay attacks while minimizing system overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the system uses a traditional modification period for SIB transmission, then system overhead is reduced, but security against replay attacks deteriorates
Solution Approach 1:
The patent segments the traditional modification period into two distinct time windows: a freshness window for signature validation and a modification window for actual SIB updates. This segmentation allows the system to validate signatures more frequently (enhancing security) while maintaining less frequent actual content updates (reducing overhead), thereby resolving the contradiction between security and system overhead.
2Reliability
If the system increases signature verification frequency, then security against replay attacks is improved, but system overhead increases
Solution Approach 1:
The patent implements dynamic time window adjustment where the freshness window duration and modification window duration are independently configurable. This allows the system to optimize the balance between signature verification frequency and overhead by adjusting window sizes based on security requirements and network conditions, resolving the contradiction between enhanced security and reduced overhead.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may identify a freshness window for a system information block and a signature that corresponds to the system information block, the freshness window having a duration that is less than a duration of a modification period for the system information block. The network node may transmit the system information block and the signature within the freshness window. Numerous other aspects are described.