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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?

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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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Vincenza
3 days ago
Totally agree, Proof of Work was the first!
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Refugia
8 days ago
D) Proof of Work is the answer!
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Glen
13 days 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
18 days 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
23 days 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.
upvoted 0 times
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Teddy
29 days 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.
upvoted 0 times
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