Question: 1. Explain Sending message secretly and Digitally signing a document. You can draw to indicate the flow of data and keys. (30 pts) 2. What

1. Explain Sending message secretly and Digitally signing a document". You

1. Explain Sending message secretly and Digitally signing a document". You can draw to indicate the flow of data and keys. (30 pts) 2. What is the structure of a block in bitcoin blockchain? You can answer either by drawing or by explaining all the items one by one (the former is preferred) (30 ptd)

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