Ethereum Classic’s Terrible, Horrible, No Good, Very Bad Week

 Ethereum Classic developers were still licking fresh wounds late last week when yet another 51% attack was launched against their blockchain early Thursday morning.

And as the bits settle, the proof-of-work blockchain’s future remains in question more than ever.

The first attack occurred on Aug. 1, the network’s second ever. Five days later, a second 51% attack followed the news that the first had indeed seen a successful double-spend of $5.6 million worth of ETC.

Read more: Ethereum Classic Suffers Reorganization That Resembles 51% Attack Amid Miner ComplicationsThe second attack was perhaps more important, although smaller in monetary terms ($1.68 million). 

By striking twice, the attacker proved the blockchain has seemingly no ability to protect itself from meaningful exploits.A 51% attack on a blockchain refers to a miner or a group of miners trying to control more than 50% of a network’s mining power, computing power or hash rate.

Proof of work and immutability

Ethereum is a hard fork of Ethereum Classic.

 The two chains split in 2016 in a disagreement over the value of immutability following a compromised smart contract, The DAO, causing a blockchain “rollback.”At that time, Ethereum Classic developers decided to eat the attack’s losses. The majority of Ethereum’s leadership and hashing power did not and hard forked under the ETH ticker.

Four years later, Ethereum Classic has continued to operate in the shadow of Vitalik Buterin’s Ethereum.

 The smaller chain’s last few hard forks have all but copy and pasted Ethereum’s work.Yet, the project has differentiated itself on one point: a commitment to the Proof-of-Work (PoW) consensus algorithm used by Bitcoin. Ethereum, on the other hand, has slowly moved toward the novel Proof-of-Stake (PoS) under the Ethereum 2.0 project.


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