* Question
| The WirelessHART security system defines four keys. What is it? |
* Answer
| 1) When there is no network key, the public key is used to generate the MIC of the MAC layer.
2) The network key is shared by all network devices and used by the network device to generate the MIC of the MAC layer. 3) The network access key is unique to each network device.The session key can be further divided into a unicast key and a broadcast key.Unicast keys and broadcast keys are very difficult in how to store and use random numbers (Nonce). |
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