Information Protection Method for 5G Network Authenticity
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Solution Overview
Problem
In communication systems, particularly in 5G networks, there is a challenge in verifying the authenticity and reliability of information transmitted between devices, as the receiving terminal cannot confirm whether the information sent by one device is genuinely from the intended source or tampered with by intermediate devices.
Innovation Solution
The proposed solution involves performing security protection on information using a first key, which is then sent through multiple devices, with each device performing integrity verification and/or decryption using the same key to ensure the information's authenticity and integrity, employing key derivation methods during the 5G authentication and key agreement process to generate verification keys for subsequent message interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If information is forwarded through multiple devices, then communication versatility and network flexibility are improved, but information security and authenticity verification become more difficult
Solution Approach 1:
The patent applies preliminary action by performing integrity protection on information before it is forwarded through intermediate devices. The sending terminal calculates an integrity protection value based on the information and a first key, then attaches this value to the information. This preliminary security measure ensures that even though the information passes through multiple devices, its authenticity can be verified by the receiving terminal using the same first key, thus resolving the contradiction between communication versatility and information authenticity.
2Reliability
If security protection is performed using a first key, then information authenticity and integrity are improved, but key management complexity increases
Solution Approach 1:
The patent applies universality by establishing a communication reference signal between the sending terminal and receiving terminal that includes both the first key and a second key. This reference signal enables multiple functions: the first key is used for integrity protection verification, while the second key is used for encryption. By consolidating multiple key management functions into a single communication reference signal mechanism, the patent reduces the overall complexity of managing multiple keys separately, thus resolving the contradiction between information integrity and key management complexity.
3Reliability
If integrity verification is performed by the receiving terminal, then information authenticity is improved, but processing time and computational resources increase
Solution Approach 1:
The patent applies self-service by having the sending terminal perform integrity protection on the information before transmission. The integrity protection value is calculated and attached to the information itself, enabling the receiving terminal to verify authenticity using the same first key without requiring complex verification procedures. This self-service approach shifts the computational burden to the sending terminal during transmission, allowing the receiving terminal to perform simple verification, thus resolving the contradiction between information authenticity and verification time.
Data Source
AI summary
An information protection method includes: performing, by a first device, security protection on first information by using a first key; and sending, by the first device, the first information with security protection to a second device, for use by the second device to send the first information with security protection to a third device by the second device.