Chinese Banks to Create Credit Blacklist on Blockchain

Suning Bank will place a list of suspicious borrowers in a distributed ledger to establish cooperation with other financial institutions
14 June 2018   892

The banking unit of Chinese retail giant Suning is testing a blockchain-based application that will allow banks to create a common list of customers with a bad credit history. This is reported by the CoinDesk.

According to the local edition of Sina Finance, Suning Bank will place a list of suspicious borrowers in a distributed ledger to establish cooperation with other financial institutions andd prevent fraud. Each participating institution becomes a node of the blockchain in the consortium and will have access to the original "black list" and will supplement it with their own data.

Suning Bank was founded in 2017. In September last year, together with the banks CITIC and Minsheng, it joined a consortium that uses a blockchain system to record transactions of domestic letters of credit.

In May 2018, the British fintech-company Billon announced the development of a solution for the Credit Information Bureau, which will store and delete client data using distributed registry technology.

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.