What Is a ‘Mining Cartel’ and How Does It Relate to PoW Centralization?

A mining cartel is a secret agreement or collusion between multiple large mining pools or individual miners to collectively control a significant portion of a PoW network's hash rate. While not a single entity, their combined power could reach or exceed the 51% threshold, allowing them to execute attacks or censor transactions.

This represents a centralization risk even if no single pool controls 51% individually.

How Does MPC Address the Risk of ‘Insider Collusion’ in a Custodial Setup?
What Is a “51% Attack” and Why Is Hash Rate Relevant to It?
What Is ‘Miner Centralization’ in PoW and How Does It Compare to ‘Validator Centralization’ in PoS?
How Do ‘Mining Pools’ Affect the Decentralization of PoW Networks?
What Are the Centralization Risks Associated with Staking Pools in PoS Systems?
How Does a 51% Attack Differ between PoW and PoS Systems?
Is It Easier to Perform a 51% Attack on a Proof of Stake or a Proof of Work Network?
What Is the Concept of ‘Miner Centralization’ and Its Risk to PoW Security?

Glossar