Dual-Bluetooth Key Transfer for Secure Low-Power Communication
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Solution Overview
Problem
Traditional Bluetooth communication methods suffer from low security, particularly in the transmission of encryption keys and data, which can lead to key leakage and data vulnerabilities.
Innovation Solution
Implementing a dual-processor system in electronic devices where one processor communicates through an encrypted channel of a first Bluetooth and the other through an unencrypted channel of a second Bluetooth, ensuring secure key transmission and data encryption/decryption processes are segregated to enhance security and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional Bluetooth communication is used for data transmission, then communication simplicity is maintained, but security of key transmission and data encryption is compromised
Solution Approach 1:
The communication system is divided into two distinct Bluetooth modules: Bluetooth first module dedicated to secure key transmission and Bluetooth second module for data transmission. This segmentation isolates the security-critical key exchange from general data communication, ensuring that even if the data channel is compromised, the encryption keys remain protected.
Solution Approach 2:
The patent introduces an encrypted channel as an intermediary layer between the key transmission process and the unencrypted data transmission channel. The encryption keys are transmitted through this secure intermediary channel first, establishing cryptographic protection before data flows through the less secure data channel.
2Reliability
If encryption is applied to all Bluetooth communication channels, then security is improved, but power consumption increases
Solution Approach 1:
Encryption is applied selectively rather than uniformly across all communication channels. The Bluetooth first module uses encrypted channels specifically for key transmission where security is critical, while the Bluetooth second module uses unencrypted channels for data transmission to conserve power. This local application of encryption optimizes the balance between security and energy consumption.
Solution Approach 2:
The communication system segments encryption requirements by function: cryptographic keys require strong encryption protection, while transmitted data can use weaker or no encryption. This functional segmentation allows the system to minimize power consumption by applying encryption only where absolutely necessary for security.
3Reliability
If encryption is applied to all Bluetooth communication channels, then security is improved, but communication efficiency decreases
Solution Approach 1:
The patent applies different security levels to different communication streams based on their sensitivity. Encryption is applied locally only to the key transmission channel where security breaches would be catastrophic, while data transmission proceeds through an unencrypted channel for maximum efficiency. This selective approach maintains security for critical operations while optimizing overall communication throughput.
Solution Approach 2:
The communication architecture segments traffic into security-critical key exchange and regular data transmission, allowing each segment to use the most appropriate transmission mode. This segmentation eliminates the need to sacrifice communication efficiency across the entire system to protect only the most sensitive operations.
Data Source
AI summary
An encrypted communication method is applied in a first electronic device, which includes a first processor communicating through encrypted channel of first Bluetooth, and a second processor communicating through unencrypted channel of second Bluetooth. The method includes: receiving, by the first processor, a key transmitted from a second electronic device, and transmitting the key to the second processor, the key being transmitted from the second electronic device to the first processor through the encrypted channel of the first Bluetooth; receiving, by the second processor in response to the first electronic device being switched to a system run by the second processor, a first ciphertext transmitted from the second electronic device, the first ciphertext being transmitted from the second electronic device to the second processor through the unencrypted channel of the second Bluetooth; and decrypting, by the second processor, the first ciphertext with the key to obtain the first plaintext.