Saturday , July 2 2022

Bitcoin Cash ABC update can show vulnerabilities | criptonoticias


A study by BitMEX Research found that the Bitcoin Cash ABC's new update after bifurcation brought certain clarity to its protocol.

Bitcoin ABC updated the customer, the new version 0.18.5 combined control points in every 10 blocks in the chain. According to the developers of this update, the aim is to prevent block reorganization attacks from happening (reorgs), after the ongoing threats received by the Bitcoin Cash Network (BCH) after this November 15th bifurcation. However, the update reduces the risk of attackers who rewrite the string, Introduces a new vector of intrusions that can attack abusive minersAccording to BitmeX.

In the publication of the BitMEX research team, the house of cryptoidal changes allows the update to allow an alternative attack. reorg. As explained, the addition of the control point in each of the 10 blocks may allow a division of the "honest chain", ie the main chain. In the research, when block 10 is produced, The attacker could build a secret parallel chain from this point. In this way, while some miners in the main Bitcoin Cash ABC network may first undermine the malicious block, others can weaken the honest block.

In BitmeX, researchers believe that checkpoints can be "contradictory" for the Bitcoin Cash ABC network. In addition, they think that the possibility of causing a division in the consensus can be olma harmful to the network Buna.

On the other hand, Bitcoin developer Eric Wall, the checkpoints in every 10 blocks, malicious miners "still in the initial synchronization" or was temporarily interrupted.

According to the wall, mismatched nodes may first take the blocks of the malicious chain, which causes the honest chain to be rejected. In this context, BitMEX claims that this feature will remove the update of Bitcoin ABC from what is suggested in Bitcoin white paper; this means that ”nodes are separated from the network and can be reunited by will bu; 7/24 for nodes to be online.

The wall also only highlights You need to use 10 blocks to take control of the network. This attack, according to the developerThis has a cost of 27,000 and does not require the processing power required to carry out an attack of 51%. Actually, computer provides To manage the malicious chain, only one Antminer S9 is needed.

Also, possible alternative attacks are not the only problem faced by the 0.18.5 version of Bitcoin Cash ABC. Another point of criticism of the new practice is that it "enhances centralization by giving developers more power". Bitcoin Andreas Antonopoulos' faculty member and expatriate his Twitter account In decentralized networks "we must be skeptical about the change of power".

In this context, BitMEX will not provide more power for developers to include these checkpoints., Unlike the control points that the Bitcoin network has, the new version of the Bitcoin ABC client "points are automatically generated by the node software, not by the software development team".

However, Bitmex currently states that it is unclear how the inclusion of these control points symbolizes a B significant improvement ği for the safety of the BCH ABC network.

At the same time, the researchers believe that the new Bitcoin ABC client update doesn't do "proper discovery" before launching. First of all, if the inclusion of control points means a fundamental change in consensus dynamics.

Truce came after threats

Bitcoin Cash 's pre – and post – bifurcation tension was numerous. The ecosystem plunged into a mess of mining pools and a battle of threats. Despite the threats, bifurcation took place, which led to the launch of the Bitcoin Cash ABC update.

On the days following the update, Bitcoin SV supporter Calvin Ayre proposed a truce between sub-codes. Ayre said he thought it was time to give up the battle because Bitcoin SV was about real Bitcoin Cash. In addition, the head of CoinGeek agreed not to take legal action against those who attacked their pool during bifurcation, or those who attacked the website a week ago.

The developers and supporters of Bitcoin Cash ABC did not comment on this.

Featured image Neil /

Source link