Ethereum’s MEV vulnerability will be ‘less of a problem’ »alt =» Ethereum’s MEV vulnerability will be “less of a problem” – Buterin 101 ″ class = »content-img» /> Source: Adobe / H_Ko

Ethereum (ETH) co-founder Vitalik Buterin says it is about to become more difficult for attackers to exploit a vulnerability that allows them to attack the network, damaging it and its users.

As reported, a “personal project” (now suspended) by the developer and CEO of the Evento hackathon platform , Edgar Aronov, has been much discussed recently, as it would allow for an “on-demand reorganization”. A reorganization is a programmatic reorganization of chains that allows miners to remove previously confirmed blocks from a blockchain.

y “go back in time” to acquire Miner Extractable Value (MEV), a measure of the profit a miner can make through their ability to arbitrarily include, exclude, or reorder transactions within the blocks they produce.

However, the Ethereum network is slated to merge Ethereum 2.0 (not expected before the end of 2021), when Ethereum’s current mainnet is ‘merged’ with the beacon chain’s proof-of-stake (PoS) system.

According to Buterin and Research on paradigms partner Georgios Konstantopoulos, unlike what has been seen in proof-of-work (PoW) networks, the Ethereum beacon chain implements a PoS protocol ‘Pito’ and two roles during the production of blocks:

  1. proposer: a validator has the task of proposing a block;
  2. attestators: group of validators who vote on which block they consider the head of the canonical chain.

Thus, the authors argue that, after the merger, reorganization validation “will become much less of a problem” and more difficult to perform, “because individual attestors or small groups of certifiers cannot reorganize a block by themselves”.

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Doing a reorganization outright requires the attacker to verify nearly 50% of all validators, according to the authors.

Every 12 seconds there is a “space”, which represents an opportunity to propose a block, and for each one, a shuffling algorithm chooses a committee of validators pseudo-randomly, so attackers “have no way of concentrating their validators. In a single slot ‘.

As stated before, in PoS, it is the validators who do what the miners do in PoW. Validators are randomly chosen to create blocks and are responsible for verifying and confirming the blocks they do not create.

Brief reorganizations happen all the time due to latency, the authors said. y are not fatal, but have “significant damaging consequences” for the network, namely: node costs, deterioration of the user experience, 51% more vulnerability to attack and uncertainty of the transaction context that increases the vulnerability of transactions decentralized financial institutions (DeFi) to accidental bankruptcy incidents, worse-than-expected business results, or malicious MEV mining.

Lengthy reorganizations are rare and “almost always caused by extreme network failures, client errors, or malicious attacks.” […] In the worst case, frequent reorganizations can completely cancel the settlement guarantees of a blockchain and impede its progress.

However, the authors stated that,

“Today Beacon Chain has ~ 196k validators, which means that each slot has a committee size of ~ 6125. As a result, even single-block reorders are extremely difficult, because an attacker who checks only a few validators does not it does. re is a way to beat the honest majority of thousands of guarantors.

Furthermore, long rearrangements are not possible because all blocks that are more than two eras in the past are “finalized” in the sense that it is impossible to restore them to the past, they said.

But Buterin and Konstantopoulos said that “there are still some small risks” and more updates need to avoid “.___ To learn more: – It ‘s time to build DeFi ethereum beyond price and focus – Vitalik Buterin- ethereum go to London August, but some changes will have to wait – Ethereum’s economy is a house of cards

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