Ethereum Classic

Ethereum Classic suffers three consecutive 51% attacks

August 31, 2020
Attack Types: 
51%
Entity Types: 
Blockchain
Target Entities: 
Ethereum Classic

Summary # Ethereum Classic, a well-known cryptocurrency, experienced a series of three 51% attacks in August 2020. The attackers reorganized over 14,000 blocks and managed to double-spend ETC coins. Attackers # The identity of the attackers behind the Ethereum Classic 51% attack remains unknown. Losses # During the Ethereum Classic 51% attack, it was reported that the attackers took home more than $9 million in double spend transactions. This loss was borne by crypto exchange OKEx; platform users did not endure any loss due to OKEx’s user-protection policy. ...

Ethereum Classic suffers a 51% attack

January 5, 2019
Attack Types: 
51%
Entity Types: 
Blockchain
Target Entities: 
Ethereum Classic

Summary # Ethereum Classic, a well-known cryptocurrency, experienced a 51% attack in January 2019. The attackers managed to double-spend ETC coins and caused significant losses for users and exchanges. Attackers # The identity of the attackers behind the Ethereum Classic 51% attack remains unknown. It is suspected that the attackers rented the required hash power from mining marketplaces, such as NiceHash, instead of owning and operating the necessary mining hardware themselves. ...