Bitcoin Cash has reportedly suffered a 51% attack following a hard fork upgrade on May 15. After Bitcoin Cash underwent a hard fork upgrade, attackers exploited a vulnerability in the update to add invalid transactions to the unprocessed transaction pool (MemPool).

A source said that these transactions have prevented miners from participating in mining, which can be called "poison" transactions.

The attack paralyzed the Bitcoin Cash network for an hour and a half, and most miners were unable to participate in mining, while the remaining miners could only mine empty blocks.

According to sources, BTC.TOP chooses to mine empty blocks in order to continue to earn profits.

According to podcast host Guy Swann (Guy Swann), most of the miners at the time were offline due to this attack, so BTC.TOP controlled more than half of the entire network computing power of Bitcoin Cash, which also enabled them to Transactions that determine which blocks can continue on the BCH network.

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Source: BitMEX Research

The motivation for these measures is said to be to recover previously unusable BCH. A previous update to Bitcoin Cash made it impossible to spend the digital currency sent to specific addresses, however, a May 15 hard fork changed this rule:

According to the Bitcoin Cash team on GitHub, this upgrade will exempt the coins and return them to the state before they were locked, that is, any miner can take these coins and trade them.

Aaron Van Wirdum, technical editor at Bitcoin Magazine, said an unidentified miner then attempted to claim the previously unspendable coins.

When unknown miners attempted to claim the coins, BTC.com and the BTC.TOP mining pool immediately coordinated a 51% attack to return the coins to their original owners. If confirmed, it could also be a major blow to Bitcoin Cash.

"This basically dispels any notion that Bitcoin Cash is 'decentralized, censorship-resistant money,'" said Guy Swann.

The article is translated from CRYPTOSLATE; translation & proofreading: There is a fish. This article was translated and edited by Mine Vision (Miracle Moore). If you need to reprint, please indicate the source.