Monero, the leading privacy-focused cryptocurrency, is facing one of the most serious security challenges in its history.
Qubic, a project led by IOTA co-founder Sergey Ivancheglo, says it now controls more than 51% of the network’s hashrate. In blockchains secured by proof-of-work algorithms, that’s the same method used by Bitcoin, that level of control can allow an attacker to rewrite transaction history, block transactions or carry out double-spend attacks.
In a blog post, Quibic described the takeover as an „experiment” that was a „strategic, and at times combative, application of game theory.”
Developers, miners and security experts are now debating whether the network’s decentralization is as robust as many believed.
What is a 51% attack?
In a proof-of-work blockchain, miners compete to add new blocks of transactions to the chain. If one group controls more than half of the total computing power, they can outpace every other participant.
That level of control opens the door
We współpracy z: https://www.coindesk.com/business/2025/08/12/monero-s-51-attack-problem-inside-qubic-s-controversial-network-takeover
