Industrial Technology Research Institute

Yi-Hsiung Huang

Lun-Chia Kuo

Wen-Guey Tzeng

Chya-Hung Tsai

Huan-Chung Lin

A dual-mode wireless sensor network system including a local wireless sensor, a local event processing device, and a remote event processing device is provided. The local wireless sensor detects and announces an abnormal event. The local event processing device and the remote event processing device receive the abnormal event announcement. When the local wireless sensor detects the abnormal event, the local wireless sensor encrypts an abnormal event message related to the abnormal event with a regular mode key and transmits the encrypted abnormal event message to the local event processing device. When the local wireless sensor does not receive a response message from the local event processing device, the local wireless sensor encrypts the abnormal event message with a special mode key and transmits the encrypted abnormal event message to the remote event processing device. Thereby, the abnormal event can be successfully announced even with highly protected privacy.

Dual-mode wireless sensor network system and key establishing method and event processing method thereof

Disclosed relates to an access control system and method based on hierarchical keys. The system comprises an access control server (ACS), a home gateway, and a plurality of sensor devices disposed on a home network. The ACS sets up user's access limits of authority and authorization verifier, and saves the related data of user's password and the user's access limits of authority. The gateway records the authority limits' level and the authority limits' key which are constructed based on a hierarchical key structure. When a user logs in the ACS to request access, an one-time communication key between the user and the home gateway is established by exchanging the ticket and the token that are issued by the ACS. This allows the user to access the information of the sensor devices.

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Tainan County, Taiwan

Yi-Hsiung Huang