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Consensus & Mining
51% Attack
Consensus & Mining
Intermediate

What is

51% Attack?

An attack where someone controls majority hash power to potentially reverse transactions or double-spend.

A 51% attack occurs when an entity controls more than half the network's mining power, potentially enabling double-spends or transaction censorship. On Ergo, the cost of such an attack is prohibitive due to the distributed hash rate, ASIC-resistance, and the need to sustain the attack.

Key Points

  • Requires >50% of hash power
  • Could enable double-spending
  • Very expensive to execute
  • ASIC-resistance helps prevent
  • Attack must be sustained
  • Never successfully done on Ergo

Related Infographics

Autolykos: Mining Without Masters

Autolykos: Mining Without Masters

How Ergo's Autolykos PoW keeps mining open to consumer GPUs, limits pool dominance and funds long-term security with block rewards plus storage rent.

Fair & Secure: VC Chain vs Ergo at a Glance

Fair & Secure: VC Chain vs Ergo at a Glance

How Ergo's fair PoW launch and Autolykos design differ from typical VC chains.

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Ergo Oracle Pools: A Trust-Minimised Oracle Model Explained

Learn how Ergo's decentralized oracle pools minimize trust assumptions through on-chain aggregation, permissionless participation, and transparent data storage in eUTXOs.

Frequently Asked Questions

Questions about 51% Attack

Common questions about this topic

How to get started with Ergo?

Start by getting a wallet (Nautilus for browser, Terminus for mobile). Back up your seed phrase securely offline. Get some ERG from an exchange (Gate.io, KuCoin) or DEX (Spectrum). Make a test transaction. Then explore: try DeFi on Spectrum, check out NFTs, or dive into the technology if you're a builder.

How-to
Getting Started

Is Ergo a good investment?

This is not financial advice. Ergo has strong fundamentals: fair launch (no VC dump risk), innovative technology (eUTXO, Sigma Protocols, NiPoPoWs), active development, and a cypherpunk ethos. It's a smaller market cap project with higher risk/reward than established chains. Research thoroughly, understand the technology, and never invest more than you can afford to lose.

Comparison
Getting Started

How do NFTs work on Ergo?

Ergo NFTs are native tokens with quantity of 1, making each unique. Unlike Ethereum where NFTs need smart contracts, Ergo NFTs are first-class protocol citizens. Mint for minimal fees (~0.001 ERG), trade on SkyHarbor marketplace, and enjoy full eUTXO security. NFTs can include rich metadata and royalties.

Explainer
Technology

How do miners earn money on Ergo?

Ergo miners earn from three sources: block rewards (newly minted ERG), transaction fees, and storage rent. Block rewards decrease over time according to the emission schedule, but storage rent ensures long-term income even after all ERG is mined. Most miners use pools for consistent payouts.

How-to
Mining
View all questions

Explore More Terms

Proof-of-WorkProof-of-StakeConsensus MechanismFinalityDouble SpendConsensus

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