Wireless LAN Key Generation via SSID Encoding
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Solution Overview
Problem
In wireless communication systems, the authentication server faces increased processing load and extended connection establishment time when generating and transmitting numerous WEP keys for multiple wireless LAN clients simultaneously, leading to inefficiencies in connection processing.
Innovation Solution
A communication system where the access point generates and stores connection information using a predetermined algorithm, allowing communication terminals to receive and generate key information independently, thereby sharing the processing load and reducing connection establishment time, while also enhancing security through specific information verification and dynamic key updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the authentication server generates and transmits WEP keys for multiple wireless LAN clients simultaneously, then the security level is improved through dynamic key assignment, but the processing load on the authentication server increases temporarily and the processing time for connection establishment is extended
Solution Approach 1:
The patent divides the key generation function between the authentication server and wireless LAN clients. The access point stores connection information including generation algorithms, and each client independently generates its own WEP key using the received connection information and the algorithm, rather than having the authentication server generate all keys centrally. This segmentation reduces the server's processing load while maintaining security through dynamic key assignment.
Solution Approach 2:
The wireless LAN clients perform self-service by generating their own WEP keys independently using the connection information received from the access point and the predetermined generation algorithm stored in the access point. This eliminates the need for the authentication server to generate and transmit individual keys to each client, significantly reducing server processing load while maintaining secure dynamic key assignment.
2Reliability
If the authentication server generates and transmits WEP keys for multiple wireless LAN clients simultaneously, then the security level is improved through dynamic key assignment, but the processing time for connection establishment is extended
Solution Approach 1:
The access point preliminarily stores the connection information and the predetermined generation algorithm before actual key generation is needed. When a wireless LAN client connects, the access point simply transmits the pre-stored connection information to the client, which then immediately generates its key using the pre-available algorithm. This preliminary preparation eliminates time-consuming key generation operations during connection establishment.
Solution Approach 2:
By enabling clients to generate their own keys independently using the connection information and algorithm provided by the access point, the system eliminates the sequential key generation and transmission process that currently extends connection establishment time. Multiple clients can simultaneously perform independent key generation without blocking each other or the server.
3Productivity
If the access point stores connection information and clients generate keys independently, then the processing load on the authentication server is reduced, but the system complexity increases due to algorithm storage and key generation requirements
Solution Approach 1:
The connection information stored in the access point serves multiple functions: it contains both the client identification data and the predetermined generation algorithm needed for key creation. This universal packaging of information simplifies the system by eliminating separate algorithm storage requirements and reduces the overall system complexity despite the distributed key generation approach.
Solution Approach 2:
Instead of having the authentication server create and transmit unique keys to each client, the system uses connection information that clients copy and process locally. The predetermined generation algorithm is embedded in the connection information, allowing clients to reproduce the correct key through local computation rather than receiving it directly, simplifying the server's role.
Data Source
AI summary
A WEP key is generated from predetermined binary data and stored in an access point. The binary data is converted into an SSID using a predetermined conversion algorithm. The access point transmits the SSID in a beacon. A mobile game apparatus receives the SSID and recovers the binary data from the SSID using the predetermined conversion algorithm. Using the same algorithm as used for generating the WEP key, a WEP key is generated from the recovered binary data. Encrypted communication is performed between the access point and the mobile game apparatus using the WEP key.