The MAC is in the header because the controller needs to identify the device before decrypting. Encryption keys are per-device, assigned during adoption, so the controller has to know which device is talking before it can look up the right key. Not a security oversight, just a practical requirement. But it means you can route inform traffic without touching the encryption at all.
Блогершу, потерявшую зрение из-за онкологии, не удалось вылечить20:53
，这一点在钉钉中也有详细论述
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Новая информация о несовершеннолетних поджигателях, осужденных за терроризм14:58