| 摘要 |
The invention relates to a method for securely broadcasting sensitive data in a wireless sensor networks comprising a central device, called trust center, and a plurality of sensor nodes, the trust center being initialized with a cryptographic hash chain and each node being initialized with a node key and the anchor of the trust center hash chain, the method comprising the following steps: the trust center broadcasting a first secure message to the nodes, each node, after reception of the first message, creating a first acknowledgment message, and transmitting it back to the trust center, the trust center checking whether all the nodes have transmitted respective first acknowledgment message, and in case all messages have been received, the trust center securely broadcasting sensitive data in a third message, the nodes checking, based on elements included in the first message, whether sensitive data actually originates from the trust center.
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