51% Attack | ForkLog

ForkLog 237 15.09.2025

Monero Experiences Largest Block Reorganisation in 12 Years

The Monero network underwent a rollback of 18 blocks, rendering 117 transactions invalid. This was noted by ecosystem users.

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ForkLog 448 22.08.2025

Qubic versus Monero: threat or theatre?

What may lie behind Qubic’s motives and the fallout from the attack on Monero.

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ForkLog 215 21.08.2025

Monero Community Explores New Defenses Against 51% Attacks

In Monero, the possibility of upgrading the Proof-of-Work consensus algorithm is being explored. The goal is to protect the network from a 51% attack after Qubic claimed control over a significant portion of the hashrate.

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ForkLog 266 20.08.2025

Two Mining Pools Seize 51% of Bitcoin Hashrate

The mining pools Foundry USA and AntPool now control over half of the hashrate of the leading cryptocurrency network, potentially paving the way for a 51% attack.

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ForkLog 1015 18.08.2025

Researchers Debunk Alleged 51% Attack on Monero

The RIAT Institute disputed Qubic’s claims of a 51% attack on the Monero network. Researchers described the incident as a “staged media stunt to promote their own project.” The information was refuted by analysts from The Block, BitMEX Research, Kaspa project developer Shai Wyborski Shai Wyborski, and the Monero community. Alex Petrov, co-founder and CIO […]

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ForkLog 209 18.08.2025

Qubic Developers Target Dogecoin for 51% Attack

The Qubic mining pool community has selected Dogecoin as the target for their next 51% attack. The vote was initiated by the project’s founder, Sergey Ivancheglo. The #Qubic community has chosen #Dogecoin. pic.twitter.com/EnevIZUAw5 — Come-from-Beyond (@c___f___b) August 17, 2025 He proposed a choice between the networks of Dogecoin, Kaspa, and Zcash. Dogecoin received over 300 […]

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ForkLog 116 13.08.2025

Expert: Qubic’s Attack on Monero Was More PR Than Threat

The mining pool Qubic launched an attack on the Monero network, which turned out to be more of a PR campaign than a genuine threat. This was stated to ForkLog by Alex Petrov, co-founder and CIO of Hyperfusion. Qubic significantly increased its visibility and token value, while the Monero network did not suffer any significant […]

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ForkLog 106 12.08.2025

Qubic Mining Pool Seizes Control of Monero

The founder of SlowMist, known by the pseudonym evilcos, announced a successful 51% attack on the Monero network by the Qubic mining pool. The platform now controls a significant portion of the network’s hashrate. 关注一段时间了，这次针对门罗币的 51% 攻击看来是成功了（感谢黑手册群友信息），不过成本也很高，最终不确定这样做的经济收益是什么… 现在理论上 Qubic 这个矿池可以重写区块链，实现双重支付，并审查任何交易… 相关平台注意可能的威胁，保持关注。 https://t.co/cKlMyuvy9C pic.twitter.com/U9J9bDiF85 — Cos(余弦)😶‍🌫️ (@evilcos) August 12, 2025 Experts have observed a major blockchain […]

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ForkLog 58 29.07.2025

Qubic’s Controversial 51% Attack Plan on Monero Sparks Debate

The Qubic platform, led by IOTA co-founder Sergey Ivancheglo, announced plans to capture 51% of Monero’s hash rate from August 2 to 31. The community criticized the initiative. Qubic operates on the useful Proof-of-Work (uPoW) algorithm—converting mined XMR into USDT to buy back and burn its QUBIC tokens, creating a deflationary model. In May, the […]

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ForkLog 37 18.05.2025

Ethereum Developer Compares 51% Attack Costs on Bitcoin and Ethereum

A 51% attack on Bitcoin would cost approximately $10 billion, significantly less than the amount needed to compromise the Ethereum network. This was stated by leading Ethereum developer Justin Drake in an interview with Cointelegraph. The figure he mentioned aligns closely with the estimate by Etherealize co-founder Grant Hammer, who calculated that $8 billion would […]

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ForkLog 42 11.07.2024

Vitalik Buterin Urges Ethereum Community to Brace for Potential 51% Attack

Ethereum co-founder Vitalik Buterin has advocated for enhancing the network’s preparedness against a hypothetical 51% attack, reports The Block.

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ForkLog 24 16.02.2024

CoinMetrics Assesses the Cost of a 51% Attack on Bitcoin and Ethereum

States can no longer destroy Bitcoin and Ethereum networks through a 51% attack due to the “astronomical” costs involved, according to CoinMetrics experts. How much does it cost to 51% attack Bitcoin and Ethereum? To find out, we simulated what an attack would look like. Our paper, Breaking BFT, was published today with some interesting […]

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#51% Attack