Buterin to Demand Court Challenge Against nChain Patent

Ethereum founder openly criticized the latest patent of the research company nChain and called for its annulment in court
27 June 2018   1700

NChain, whose chief researcher Craig Wright had previously stated that he was the creator of Bitcoin Satoshi Nakamoto, while actively promoting Bitcoin Cash, received the latest patent in Europe for "invention in the field of digital security". This is reported by Bitcoinist.

This Deterministic Key Generation technique provides for improved secure communication between a pair of nodes or parties on a network, while being able to keep their private keys secret.
 

nChain Press Release

nChain is trying to create a set of tools on the blockchain to carry out cross-border transfers through the so-called "Internet transactions".

Wright's company continues to attract attention due to ambiguous marketing decisions. Last month, at a conference in Rwanda, Wright told the audience that "he has more money than the whole of their country."

This looks like they're trying to patent plain old public master key-based deterministic wallets, like what we had in 2013. Can't someone attack it in court with the obvious mountains of prior art?
 

Vitalik Buterin

Co-founder, Ethereum

In the past, Buterin repeatedly accused Wright of fraud.

Describing the possibilities for applying the present invention, nChain CEO Jimmy Nguyen said that their technology has been recognized by the Japanese technology conglomerate SBI.

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   979

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.