ETC Weekly #1 | Network security, Thanos hard-fork, ECIP comparison

October 30, 2020

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Protocol News

The majority of ETC mining pools now have ECIP-1100 (MESS) enabled. Therefore the incentive for a 51% attack is greatly reduced because they would have to produce a chain segment with greater total difficulty than the canonical chain. Thanos hard-fork: ECIP-1099 is accepted which will halve the size and growth rate of the DAG. ECIP-1099 will require a hard-fork, code-named, Thanos. Both Hyperledger Besu and Core-geth support ECIP-1099 and upon successful testing, the Thanos hard-fork would occur at block 11,700,000. It’s important to note that because of the DAG modification will change the algorithm to be Etchash instead of Ethash.

Below you’ll find a page of resources for Etchash

Etchash resources:

Etchash is the modified dagger hashimoto used by ethereum classic. it is comparable in it's behaviour to ethash.

Below are the currently supported clients:


The ETC Cooperative and IOHK have collaborated to produce an ECIP Comparison for 51% Attack Resistance to provide the broader community with knowledge and understanding on how resist 51% attacks.