IoT Command Transmission Using Local Asymmetric Key Protection
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Solution Overview
Problem
Existing information transmission methods in IoT systems are vulnerable to interception and decryption by unauthorized parties, compromising user privacy.
Innovation Solution
Implementing a secure information transmission method using asymmetric keys, where a public key is sent to a smart device during network access configuration, and a private key is saved locally, enabling encrypted communication without server involvement, and utilizing hash calculations for secure key backup and update.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If information is transmitted through a server in the IoT field, then communication between devices is enabled, but security is compromised as lawbreakers can intercept and decrypt sensitive information
Solution Approach 1:
The patent extracts the encryption/decryption function from the server and places it in the terminal device itself. The terminal device generates and stores encryption keys locally, and performs encryption before transmission and decryption after reception, removing the server from the security-critical path and eliminating the vulnerability to server-side interception
Solution Approach 2:
The terminal device performs preliminary encryption actions before information transmission. Encryption keys are generated and stored in advance, and information is encrypted before being sent through the server, ensuring security is established prior to the transmission process rather than relying on server-side protection
2Reliability
If encryption keys are stored on the server, then key management is centralized, but privacy protection is weakened as keys become vulnerable to interception
Solution Approach 1:
The patent extracts the key storage function from the server and relocates it to the terminal device. Encryption keys are generated, stored, and managed locally on the terminal device, eliminating the server from the key management process entirely and ensuring keys never leave the terminal in unencrypted form
Solution Approach 2:
The terminal device performs self-service for key management by generating its own encryption keys, storing them securely in local memory, and using them for encryption and decryption operations without requiring server involvement in the key management process
Data Source
AI summary
An information transmission method is applied to a mobile terminal and includes: during a process of performing network access configuration on an intelligent device, sending a public key to the intelligent device, and saving a corresponding private key, wherein the public key and the private key are a pair of asymmetric keys, which are generated in advance by a mobile terminal; after a command to be sent is signed by using the private key, sending, to the intelligent device, commands before and after the signing; and after encrypted information sent by the intelligent device is received, decrypting same by using the private key.