7 Key Consensus Mechanisms that Steered the Blockchain Blizzard

4. Proof of Authority (PoA): Trust in Trusted Validators

Proof of Authority (PoA) uses a set of trusted validators—often chosen for their reputation or expertise—to maintain the blockchain. This model provides high levels of security and efficiency, making it ideal for private blockchains or consortiums. However, PoA is less decentralized and trustless compared to other mechanisms. Despite these limitations, PoA has shown its reliability in the crypto winter, particularly in enterprise-focused blockchain solutions.