S.Korean exchanges about Segwit2x and Bitcoin Gold

Coinone and Coinnest announce their policies towards forthcoming Bitcoin hard forks
22 October 2017   2076

Coinone, the second-largest bitcoin exchange in South Korea, announced its general policy concerning Segwit2x, stating that they will do everything needed to uphold the establishment of a new virtual currency, which will be formed from this hard fork in future, and obviously support deposits and withdrawals.

The bitcoin exchange stressed that withdrawals might be temporarily hold over during forks.

Coinnest, the fouth-largest bitcoin exchange and a platform of digital currency trading, announced its support both of Segwit2x and Bitcoin Gold.

We have completed the technical preparations for the hard fork for the first time among the domestic exchanges.
 

Kim Byeong-hwan

CEO, Coinnest

Coinnest states that users who hold their cryptocurrency on this platform will automatically receive payments in a new cryptocurrency and both deposits and withdrawals will be available from November 1 if both hard forks pass successfully.

Potentional Vulnerabilities Found in ETH 2.0

Least Authority have found potentional security issues in the network P2P interaction and block proposal system
26 March 2020   964

Technology security firm Least Authority, at the request of the Ethereum Foundation, conducted an audit of the Ethereum 2.0 specifications and identified several potential vulnerabilities at once.

Least Authority said that developers need to solve problems with vulnerabilities in the network layer of peer-to-peer (P2P) interaction, as well as in the block proposal system. At the same time, the auditor noted that the specifications are "very well thought out and competent."

However, at the moment there is no large ecosystem based on PoS and using sharding in the world, so it is impossible to accurately assess the prospects for system stability.
Also, information security experts emphasized that the specifications did not pay enough attention to the description of the P2P network level and the system of records about Ethereum nodes. Vulnerability risks are also observed in the block proposal system and the messaging system between nodes.

Experts said that in the blockchains running on PoS, the choice of a new block is simple and no one can predict who will get the new block. In PoS systems, it is the block proposal system that decides whose block will fall into the blockchain, and this leads to the risk of data leakage. To solve the problem, auditors suggested using the mechanism of "Single Secret Leader Election" (SSLE).

As for the peer-to-peer exchange system, there is a danger of spam. There is no centralized node in the system that would evaluate the actions of other nodes, so a “malicious" node can spam the entire network with various messages without any special punishment. The solution to this problem may be to use special protocols for exchanging messages between nodes.