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Proof of authority (PoA) is an algorithm used with blockchains that delivers comparatively fast transactions through a consensus mechanism based on identity as a stake. The most notable platforms using PoA are VeChain, Bitgert, Palm Network and Xodex.

Setting up a Proof of Authority network Pick real world entities that should control the network, so called authorities. Each authority should run an OpenEthereum node and create an account. Authorities should exchange their account addresses and place them in the spec or validator contract.

Sufficient proof of authority includes, but is not limited to, an order issued by a court of law, a lawfully executed and valid power of attorney, or a written notarized statement signed by a representative that expressly describes the authority of the representative to act on behalf of a protected consumer.

The Proof-Of-Authority (PoA) is a consensus method that gives a small and designated number of blockchain actors the power to validate transactions or interactions with the network and to update its more or less distributed registry.

Advantages and Disadvantages of Proof-of-Authority Speed and Efficiency: PoA can process transactions faster than PoW or PoS, making it suitable for applications that require high-speed data processing. Energy Efficiency: PoA is more energy-efficient as it does not require mining or high computational resources.