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Researchers: Vulnerability in Lightning Network could steal over 750 BTC via massive double-spend attack

August 13, 2022
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Two researchers from the University of Illinois, Cosimo Sguanci and Anastasios Sidiropoulos, published a paper finding vulnerabilities in the Lightning Network, explaining the vulnerabilities in the Layer 2 network using the hypothetical case where malicious nodes can collude to attack.

A consortium of only 30 nodes can lock up 31% of the channel’s funds for about 2 months via a bot attack, and can steal over 750 BTC (~$18 million) via a massive double-spend attack.

The researchers said the two attacks exploited congestion on the Bitcoin blockchain to cause damage to the Lightning Network.

A double-spend attack could be the most catastrophic. As the network continues to grow, the severity will only increase, so vulnerabilities need to be dealt with immediately and efficiently.

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