IEEE/ICACT20250026 Slide.13        [Big Slide]       Oral Presentation
In the first step, the user sends the pre-registered T1 to the IoT device. In the second step, after receiving T1, the IoT device generates a random number RIoT to be used as an encryption key. In the third step, the IoT device creates an encrypted ciphertext C1 based on the received T1, the mapped T2, and the generated RIoT. In the fourth step, the IoT device sends the generated C1 back to the user, completing the key exchange process.

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