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How does alice share key with bob

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Problem 1. Alice wants to send an encoded message to Bob. She uses a passphrase (key). How does Alice share her key with Bob?

a. Asymmetric encryption
b. Proof of work
c. Hashing

Problem 2. What is the purpose of mining on a bitcoin blockchain?

a. It validates and adds blocks of transactions to the ledger. Miners get fees and a reward for this work.
b. It's a guaranteed way to make money.
c. Public key cryptography ensures the hashrate is cheapest.

Problem 3. In the bitcoin blockchain, mining proof of work is done by

a. Alice and Bob
b. RSA algorithm
c. "guess and check" e.g. trial and error to find the special number "nonce" that solves a problem

Reference no: EM132699247

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