What Is a “Difficulty Bomb” and Which Cryptocurrency Uses It?

A difficulty bomb is a mechanism intentionally coded into a blockchain's protocol that causes the mining difficulty to increase exponentially over time. This makes mining eventually impossible.

Ethereum (ETH) used a difficulty bomb to force a transition from Proof-of-Work (PoW) to Proof-of-Stake (PoS), ensuring the network upgrade (The Merge) would occur.

What Is the Difference between Proof-of-Work (PoW) and Proof-of-Stake (PoS)?
How Does Proof-of-Stake (PoS) Differ from PoW in Terms of Security and Energy Use?
What Is the Primary Difference between PoW and Proof-of-Stake (PoS)?
How Does Proof-of-Work (PoW) Differ Fundamentally from Proof-of-Stake (PoS)?
Compare Proof-of-Work (PoW) and Proof-of-Stake (PoS) Consensus Mechanisms
What Are the Main Advantages of a Hybrid PoW/PoS Model?
What Is the Difference between PoW and Proof-of-Stake (PoS)?
What Is the Risk of a ‘Difficulty Bomb’ in Certain PoW Systems?

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