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Blockchain CBSA Exam - Topic 3 Question 106 Discussion

Blockchains are decentralized ledgers which, by definition, are not controlled by a central authority. Due to the value stored in these ledgers, bad actors have huge economic incentives to try and cause faults.What algo was the original solution to the potentialproblem as specified by Satoshi?
D) Proof of Work
A) Proof of Stake
B) Byzantine Fault Tolerance
C) Proof of Burn
E) Dynamic Proof of Stake

Blockchain CBSA Exam - Topic 3 Question 106 Discussion

Actual exam question for Blockchain's CBSA exam
Question #: 106
Topic #: 3
[All CBSA Questions]

Blockchains are decentralized ledgers which, by definition, are not controlled by a central authority. Due to the value stored in these ledgers, bad actors have huge economic incentives to try and cause faults.

What algo was the original solution to the potentialproblem as specified by Satoshi?

Show Suggested Answer Hide Answer
Suggested Answer: D

The big breakthrough when Bitcoin was invented, was the use of Proof-of-Work as a probabilistic solution to the Byzantine Generals Problem as described in depth by Satoshi Nakamoto.


by Vivan at Jul 01, 2026, 04:17 PM

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Chandra
1 day ago
True, but it was necessary for security back then.
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Wilford
7 days ago
But isn't it energy-intensive?
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Leatha
12 days ago
Exactly! It prevents double spending too.
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Monte
17 days ago
Proof of Work makes sense. It secures the network.
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Basilia
22 days ago
Yeah, I agree. It was the first solution Satoshi proposed.
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Chandra
27 days ago
I think it's D) Proof of Work.
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Karina
1 month ago
Proof of Work makes sense, but I wonder about its long-term viability.
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Arlyne
1 month ago
Wait, isn't Proof of Work super energy-intensive?
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Deonna
1 month ago
I thought it was Byzantine Fault Tolerance at first.
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Vincenza
2 months ago
Totally agree, Proof of Work was the first!
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Refugia
2 months ago
D) Proof of Work is the answer!
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Glen
2 months ago
I practiced a similar question, and I believe the answer is Proof of Work. It was crucial for Bitcoin's launch and maintaining decentralization.
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Domonique
2 months ago
I keep mixing up Proof of Work and Byzantine Fault Tolerance. I feel like they both deal with security, but I can't recall which one Satoshi specifically used.
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Lura
2 months ago
I remember studying about Satoshi's approach, and I think it was definitely Proof of Work. It was the first method to secure the network.
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Teddy
2 months ago
I think the original solution was related to how miners validate transactions, but I'm not entirely sure if it was Proof of Work or something else.
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