Preventing Validator Collusion & Censorship

Mysticeti DAG-based consensus allows multiple validators to propose transactions simultaneously, reducing the risk of censorship.

Quorum-based finality (≥ 2/3 validators) ensures Byzantine Fault Tolerance.

Nakamoto Coefficient (~13) indicates strong decentralization and resistance to validator collusion.

2. Asynchronous Consensus & Finality

FastPath (for simple transactions): Bypasses full consensus using Byzantine Consistent Broadcast for instant finality.

Mysticeti (for complex/shared transactions): Achieves finality in ~500ms using 3 message rounds.

Lutris: A hybrid, consensusless system for ultra-low latency (under 0.5s), falls back to full consensus only when needed.

3. Security Audits & Tools for Move Contracts

Trusted audit firms: Zellic, OtterSec, Blaize, Asymptotic, Certora, etc.

Tools:

Move Prover: Formal verification for logic correctness.

MoveScanner: Detects vulnerabilities in Move bytecode (new as of Aug 2025).

Move Registry: Onchain publishing of audits and source code for transparency.

Audit guides: Community resources like SlowMist’s primer help with best practices (access control, DoS, gas, logic errors).

You benefit from Sui’s strong protection against validator collusion or censorship because it uses a delegated proof-of-stake (DPoS) system where validators are chosen by token holders and rotated regularly, reducing the risk of centralized control. Each validator independently processes transactions, and Sui’s consensus protocol—built on Narwhal for data availability and Mysticeti for ordering—ensures that even if some validators act maliciously, the network continues to confirm valid transactions without interruption. By separating data broadcasting from transaction ordering, Sui eliminates single points of control, making censorship or collusion attacks extremely difficult. The move to asynchronous consensus through Narwhal and Tusk (or Mysticeti in later versions) allows you to get faster finality by letting validators process unrelated transactions simultaneously instead of waiting for a global order. This improves speed and fault tolerance, meaning your transactions reach finality in seconds even under heavy load or partial network failure. When developing Move smart contracts on Sui, you should use tools like the Sui Move Prover, which performs formal verification to detect logical errors and vulnerabilities, and the Sui Move CLI, which helps test and simulate contracts before deployment. For professional auditing, firms like CertiK and MoveBit offer in-depth analysis and verification.