If you need to define privacy rules like that from the political side, it's because your general design is wrong.
Posting ALL data from devices to a central server based on a timer from the lowest common denominator of the systems needing the data is a simple and very NAIVE design approach of such a system...
Other methods include using P2P technology as found in VoIP/Skype etc. systems. This way only data-sources that the end-user accept and authenticate can initiate remote data-acquisition. Yes this is possible even on the smallest MCU's.
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Posting ALL data from devices to a central server based on a timer from the lowest common denominator of the systems needing the data is a simple and very NAIVE design approach of such a system...
Other methods include using P2P technology as found in VoIP/Skype etc. systems. This way only data-sources that the end-user accept and authenticate can initiate remote data-acquisition. Yes this is possible even on the smallest MCU's.