Truncated MIC and PN Fields for Wireless Control Frame Integrity
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Solution Overview
Problem
Current wireless communication protocols face challenges in effectively protecting control frames and MAC headers due to high overhead from traditional integrity protection mechanisms, especially in scenarios where control frames are transmitted frequently, leading to performance impacts.
Innovation Solution
Implementing a truncated Message Integrity Code (MIC) and Packet Number (PN) field approach using GMAC-256/GCMP-256 mechanisms for control frames and MAC headers, which balances security and overhead, allowing for efficient protection of control frames and MAC headers while maintaining adequate security levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional integrity protection mechanisms are used for control frames and MAC headers, then security is improved, but overhead increases significantly
Solution Approach 1:
The patent extracts and applies integrity protection selectively only to control frames and MAC headers that require it, rather than applying uniform protection to all frame types. This selective approach reduces overall overhead while maintaining necessary security for critical control information.
Solution Approach 2:
The patent changes the protection parameter by using truncated MIC lengths (e.g., 4 bytes instead of full 16 bytes) and conditional application of integrity protection based on frame type and security requirements. This parameter optimization reduces overhead while maintaining adequate security levels for control frames.
2Reliability
If integrity protection is applied to all frame types, then security is improved, but performance deteriorates due to frequent transmissions
Solution Approach 1:
The patent applies different quality levels of integrity protection to different frame types and scenarios. Control frames receive full or truncated MIC protection while data frames may use different mechanisms, and the protection level is adjusted based on local security requirements and transmission frequency characteristics.
Solution Approach 2:
The patent uses partial action by applying integrity protection only when necessary (conditional based on frame type, security policies, and transmission characteristics) rather than universally to all frames. This partial application maintains security for critical control information while avoiding performance degradation from excessive protection on frequent transmissions.
3Reliability
If full MIC length is used for protection, then security is improved, but overhead increases
Solution Approach 1:
The patent changes the MIC field size parameter from the traditional full length (16 bytes) to truncated lengths (e.g., 4 bytes) based on security requirements and frame characteristics. This parameter optimization reduces overhead while maintaining adequate security levels for control frames where full cryptographic strength may be unnecessary.
Data Source
AI summary
For example, a wireless communication station (STA) may be configured to set a Message Integrity Code (MIC) in a MIC field to protect contents of a control frame according to a Galois Message Authentication Code with 256-bit cipher-key (GMAC-256) protection mechanism. For example, the MIC may be based on a Packet Number (PN). For example, a size of the MIC field may be less than 16 bytes. For example, the STA may be configured to set a PN field based on the PN. For example, a size of the PN field may be less than 6 bytes. For example, the STA may be configured to transmit the control frame including the MIC field and the PN field.