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How Does a Consensus Mechanism like Proof-of-Authority (PoA) Work in a Private Blockchain?

Trusted, pre-approved validators confirm transactions quickly without needing high computational power, ideal for permissioned environments.
Greeks.Live08.11.25

How Does a Consensus Mechanism like Proof-of-Authority (PoA) Work in a Private Blockchain?

Proof-of-Authority (PoA) is a consensus mechanism where new blocks are validated by a set of pre-approved, trusted validators, or "authorities." Unlike Proof-of-Work (PoW), it does not require intense computational power, making it faster and more energy-efficient. It is highly suitable for private or permissioned blockchains where identity is known and trust is established among participants.

The security relies on the integrity of the designated validators.

How Does a Private blockchain’S Consensus Mechanism Differ from a Public One like Bitcoin’s Proof-of-Work?
What Consensus Mechanism Is Typically Used in a Permissioned Blockchain?
Why Is the Concept of “Immutability” Less Absolute on a Permissioned Chain?
What Is the Difference between Proof of Work and Proof of Stake Consensus Mechanisms?

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