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IEEE/ICACT20250046 Slide.11        [Big Slide]	Oral Presentation
	The preprocessing and shared data advertising stage proceeds in the following order: the data disclosure stage, the random selection stage of the computation nodes, the interaction stage between DO and CNs and the encryption and advertising stage. First, data disclosure step. The DO generates secret keys, public parameters, and a commitment value for the original data using cryptographic setup algorithms. Then, DO distributes a DataTx transaction through the SC, which contains metadata, the commitment value, and necessary parameters for selecting computation nodes. Second, random selection step of the computation nodes. Nodes wishing to participate in the computation process submit a signed SignTx transaction to the SC. The SC then selects N computation nodes using a random selection method similar to Algorand¡¯s leader selection, updates the computation node list, and distributes it to the blockchain network.

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