Master-Slave Session Key Encryption for Wireless Parameter Setting
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Solution Overview
Problem
In wireless communication systems using the IEEE 802.11 standard, the process of setting wireless communication parameters is cumbersome and slows down when multiple devices are involved, as the master device is occupied with decrypting session keys, causing other slave devices to wait and prolonging the overall parameter setting time.
Innovation Solution
A communication system where the master device generates and encrypts session keys using public keys from slave devices, allowing slave devices to decrypt and use these keys for decrypting data, enabling simultaneous processing and faster parameter setting across multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the master device performs decryption processing for each slave device sequentially, then security is maintained through proper key management, but the time required for parameter setting increases and productivity decreases
Solution Approach 1:
The master device performs decryption processing for all slave devices in advance, before the actual parameter setting phase. By completing all necessary decryption operations beforehand, the system eliminates sequential waiting time during parameter distribution, thereby improving overall productivity while maintaining security through proper key management protocols
2Manufacturing precision
If the master device processes one slave device at a time, then processing accuracy is ensured through dedicated attention, but the duration of action increases and time is lost
Solution Approach 1:
The master device performs all decryption operations in advance before parameter distribution begins. This preliminary processing ensures that each decryption operation receives dedicated attention and accuracy, while the overall time is reduced because all processing is completed before the actual parameter setting phase starts
3Reliability
If the master device is occupied with decryption processing, then security is maintained through proper key management, but the ease of operation decreases as other devices must wait
Solution Approach 1:
The master device completes all decryption processing in advance before the parameter setting phase. This eliminates the need for other slave devices to wait during parameter distribution, improving operational efficiency and ease of operation while maintaining security through proper key management protocols throughout the process
Data Source
AI summary
A master generates a session key, receives public keys from a plurality of slaves, encrypts the session key using the individual public keys, transmits the encrypted session key to the plurality of slaves, encrypts data using the encrypted session key, and sends it to the plurality of slaves. A plurality of slaves transmit public keys to a master device, receive and decrypt a session key encrypted using individual public keys, receive data encrypted using the session key from the master, and decrypt it using the decrypted session key.