Golden
Proof-of-believability (PoB)

Proof-of-believability (PoB)

Consensus algorithm developed by IOST to enable high transaction throughput and ensuring node compliance and trust via a "believability score" based on multiple factors.

Proof-of-Believability is a consensus algorithm developed by IOST, which enables high transaction throughput speeds while ensuring nodes stay compliant, using factors including IOST token balance, reputation-based token balance, network contributions and user behaviors.



In Proof-of-Believability each node will have a "believability score" based on:

  • the amount of IOST in the node
  • the number of earned Servi tokens
  • the number of positive reviews of the node
  • the previous actions/transactions of the node.



Proof of Believability relies on a fast grade Byzantine Fault Tolerance mechanism, microstate blocks, Atomic Commit protocol, and a dynamic sharding protocol to secure transactions consistently and quickly. The use of PoB can reduce the use of storage, lower costs of processing power and configuration when compared to a PoW protocol. 



Validation of nodes is earned through previous contributions and behaviors. Reputations are evaluated on a non-tradeable token system, servi, where tokens are given to those who support the system. These servi tokens weigh when selecting a validator.

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PoB - IOST's Consensus Algorithm: How to achieve decentralized consensus - IOST



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