What is proof of work as it relates to blockchain?
- It is the security certificate issued.
- It is a list of all the devices or people that have touched the transaction.
- It is a process that includes a risk factor value that can change as the transaction moves through the process.
- It is an algorithm used for transaction validation.
Explanation: Proof of work (PoW) uses an algorithm (hash) or a block added to the blockchain to validate transactions. Each block is a list of transactions with a hash of the previous block (prior PoW) and a hash of the current block.
Exam with this question: IoT Security 1.1 Chapter 6 Quiz Answers
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