Asymmetric Key Integrity Protection for Wireless System Information
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Solution Overview
Problem
In wireless communication systems, the lack of security protection on system information allows fake network devices to modify system information, making it difficult for terminal devices to validate the integrity of received information.
Innovation Solution
Implementing an asymmetric key mechanism where network devices perform integrity protection on system information using private keys, and terminal devices verify the integrity using corresponding public keys, ensuring the validity of received system information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If system information is transmitted without security protection, then transmission simplicity is maintained, but security and integrity of the information deteriorates
Solution Approach 1:
The network device performs integrity protection on system information in advance before transmission using a private key. This preliminary security measure ensures that when the terminal device receives the information, its integrity is already protected, resolving the contradiction by maintaining transmission simplicity while preventing information tampering.
Solution Approach 2:
An asymmetric key mechanism is introduced as an intermediary between the network device and terminal device. The network device uses a private key to protect system information, and the terminal device uses a corresponding public key to verify integrity. This intermediary mechanism enables security protection without complicating the transmission process.
2Reliability
If integrity protection mechanism is implemented, then security of system information is improved, but system complexity increases
Solution Approach 1:
The patent introduces an asymmetric key mechanism as an intermediary that provides security protection. The network device performs integrity protection using a private key, and the terminal device verifies using a public key. This standardized intermediary mechanism achieves security improvement while controlling system complexity through established cryptographic protocols.
Data Source
AI summary
This application provides a communication method and apparatus, and relates to the field of communication technologies. The method may include: A network device performs integrity protection on system information by using a first private key, and sends the system information, where the system information includes a first public key corresponding to the first private key and/or an index of the first public key. Correspondingly, a terminal device receives the system information from the network device, and if determining that the first public key is valid, the terminal device verifies integrity of the system information by using the first public key. According to this method, on one hand, the terminal device can effectively identify validity of the system information. On the other hand, because the system information includes the first public key and/or the index of the first public key, flexible update of an asymmetric key can be implemented.