North Korean hackers attacks South Korean cryptoindustry

The Korea Internet & Security Agency indicated a 360% increase in malware attacks in 2017
15 November 2017   3020

The Korea Internet & Security Agency (KISA) has reported about on cyberattacks from North Korea, targeted to South Korean cryptoindustry, digital currency users and service providers. Main weapon of hackers is malware. This is reported by the Yonhap News.

According to the latest report, dated mid-November 2017, KISA indicated a 360% increase in malware attacks in 2017, in comparing to 2016. These attacks shows that the hackers put real efforts to brake daily operation of cryptocompanies and steal cryptocoins.

Cryptocurrencies such as Bitcoin and Ethereum have been claimed as the perfect tool for cybercrimes in the past.

Hackers are boldly spreading malicious code not only to hunt for bitcoins but to directly attack Internet sites. Such attacks are likely to continue.

The Korea Internet & Security Agency

According to the KISA report, 5,366 ransomware attacks were recorded in South Korea from January to September 2017. One of the main reasons behind this attack is considered to be the ongoing struggle between North and South Korea.

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   1024

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.