ETC

51-percent-at
2026-07-23 23:20:16

What a 51% Attack Means and Why It Can Rewrite a Blockchain

A 51% attack happens when miners or validators control more than half of a network’s power, allowing transaction censorship and double-spending. The guide reviews how it works, major cases, and why attacking Bitcoin is so expensive.

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What a 51% Attack Means and Why It Can Rewrite a Blockchain