Session Key Generation for Secure Wireless Communication
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Solution Overview
Problem
Conventional information processing apparatuses lack secure communication mechanisms, particularly in wireless communication systems, where the security of data transmission is not adequately ensured, making them vulnerable to unauthorized access.
Innovation Solution
An information processing apparatus equipped with a processor that generates a unique encryption key based on identification information shared between devices, using a common key stored in hardware, to encrypt and decrypt data frames, ensuring secure wireless communication by preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transmission methods are used without encryption keys, then communication simplicity is maintained, but communication security deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-storing common keys in the hardware of information processing apparatuses before communication occurs. This allows the system to have encryption capabilities ready in advance, eliminating the need for complex key exchange protocols during actual communication, thus improving security without proportionally increasing operational complexity
Solution Approach 2:
The patent implements self-service through automatic generation of session-specific encryption keys using the pre-stored common key and identification information. The system autonomously performs key derivation without requiring manual intervention or complex key management infrastructure, achieving strong encryption while maintaining operational simplicity
2Ease of operation
If a common key is shared between multiple apparatuses, then communication ease is improved, but security vulnerability increases
Solution Approach 1:
The patent applies segmentation by dividing the encryption key system into two layers: a shared common key stored in hardware for authentication, and unique session-specific keys generated for each communication pair. This segmentation allows easy communication establishment through the common key while preventing unauthorized access through the unique session keys, as compromising one session key does not affect others
Solution Approach 2:
The patent implements local quality by making each communication session have its own unique encryption characteristics through session-specific keys derived from the common key and identification information. This ensures that while the common key enables easy connection establishment, each local communication instance has its own security properties, preventing widespread compromise from a single key breach
3Reliability
If identification information is transmitted in plain text, then communication efficiency is maintained, but information security deteriorates
Solution Approach 1:
The patent applies the taking out principle by extracting and encrypting only the critical identification information portion of the frame using the session-specific key, while other less sensitive data can remain in plain text. This selective encryption approach ensures identification information security while minimizing the encryption overhead and maintaining communication efficiency
Data Source
AI summary
A master apparatus generates a frame encryption key by using a session ID unique to communication with a slave apparatus, and an apparatus common key common to the master apparatus and the slave apparatus, encrypts data of an encryption part of an action frame by using the frame encryption key, and transmits, by broadcast, the action frame including the encryption part. Upon receiving the action frame, the slave apparatus transmits a participation request to the master apparatus, and participates in the network of the master apparatus. Then, the master apparatus and the slave apparatus execute a communication application.