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This slide shows the operations of a publisher and subscriber in the secure data delivery phase.
The publisher encrypts its data using the secret key shared during the key sharing phase and transmits the encrypted data to the broker corresponding to a specific topic.
Subscribers interested in this topic subscribe to it and receive the encrypted data from the broker.
The subscribers then decrypt the data received using the secret key.
If a subscriber is subscribed to a particular topic, the broker automatically transmits any new data on that topic to the subscriber.
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IEEE/ICACT20220056 Slide.08
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