> For the complete documentation index, see [llms.txt](https://nebula-18.gitbook.io/nebula/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nebula-18.gitbook.io/nebula/tech-overview/nebula-technology-overview/consensus-and-voting-mechanism.md).

# Consensus and Voting Mechanism

## **Consensus and Voting Mechanism**

* **CometBFT Consensus:** A **Byzantine Fault Tolerant (BFT)** system ensures fast and secure consensus, even if up to one-third of validators fail or act maliciously.
* **Merkle Tree Structures:** Validators submit data verified via **Merkle proofs** to ensure cryptographic integrity and reduce computational overhead.
* **Threshold Signatures:** Requires a predefined number of validators to approve data, protecting against manipulation and Sybil attacks.