Identity-Based Signalling Protection with Fragmented PVT Broadcast
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Solution Overview
Problem
Existing identity-based cryptography schemes, such as ECCSI, incur high communication and computational overheads due to redundant transmission of Public Validation Tokens (PVT) in wireless communication networks, particularly in resource-constrained systems like 5G, exceeding the physical layer limitations of System Information Block (SIB) size.
Innovation Solution
Fragment the digital signature into multiple parts, with the Public Validation Token (PVT) applicable to a Radio Access Network (RAN) area and unique per cell, and broadcast these fragments at different intervals, reducing transmission frequency and overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If identity-based cryptography schemes are used for signalling message protection, then security is improved, but communication overhead increases due to redundant transmission of Public Validation Tokens
Solution Approach 1:
The patent segments the Public Validation Token (PVT) into multiple fragments distributed across different System Information Blocks (SIBs). Instead of transmitting the complete PVT in a single location, the token is divided such that different fragments appear in different SIBs, reducing redundant transmissions and allowing UEs to reconstruct the full token only when needed for verification.
2Reliability
If complete digital signatures are transmitted frequently, then message authentication is improved, but transmission overhead increases beyond physical layer limitations of System Information Block size
Solution Approach 1:
The digital signature components are segmented and distributed across multiple SIBs. The signature algorithm identifier, signature counter, and signature value are placed in different SIBs rather than transmitting complete signatures repeatedly, reducing overhead while maintaining authentication capability.
Solution Approach 2:
The patent implements periodic transmission of signature-related information at different intervals. Some SIBs containing signature fragments are transmitted more frequently than others, allowing the system to balance between timely authentication updates and reduced transmission overhead.
3Ease of operation
If Public Validation Tokens are transmitted in every System Information Block, then verification capability is improved, but resource consumption in resource-constrained systems increases
Solution Approach 1:
The PVT is segmented across multiple SIBs rather than being fully repeated in each SIB. UEs receive different fragments in different SIBs and reconstruct the complete token, reducing the amount of data that needs to be transmitted and processed while maintaining verification capability.
Solution Approach 2:
Instead of transmitting the complete PVT in every SIB, the system transmits only partial information (fragments) in each SIB. The UE performs partial verification using received fragments and reconstructs the full token only when necessary, reducing overall resource consumption.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose systems and methods to support identity-based Cryptography for signalling message protection in wireless communication networks, by splitting/fragmenting the digital signature into two or more fragments and making at least one of the fragmented value applicable to more than a cell, so that frequency/rate of transmission can be reduced for that fragmented part. Further, embodiments herein disclose systems and methods to broadcast the fragmented values at different intervals to reduce the over-the-air overhead and at the same time verifier able to acquire the required security parameter to verify the authenticity of the cell.