---
title: "Discussion on \"What is a 51% Attack and Why It Still Threatens Blockchains\" | Hashnode"
description: "Discussion on \"What is a 51% Attack and Why It Still Threatens Blockchains\". 51% attacks threaten blockchain security by exploiting hash power control to reverse transactions"
url: "https://hashnode.com/posts/what-is-a-51-attack-and-why-it-still-threatens-blockchains/686e697d304fada8608252e5"
---

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# [What is a 51% Attack and Why It Still Threatens Blockchains](https://tradelinkplatform.hashnode.dev/what-is-a-51-attack-and-why-it-still-threatens-blockchains?utm_source=hashnode&utm_medium=feed)

51% attacks threaten blockchain security by exploiting hash power control to reverse transactions

Jul 9, 2025 · 3 min read · tradelinkplatform.hashnode.dev  
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-   [#cryptocurrency](https://hashnode.com/tag/cryptocurrency)
-   [#crypto](https://hashnode.com/tag/crypto)
-   [#network](https://hashnode.com/tag/network)
-   [#attack](https://hashnode.com/tag/attack)
-   [#51-attack](https://hashnode.com/tag/51-attack)

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