Samsung built mining farm with old Galaxy S5

Subdivision of the South Korean giant Samsung, introduced a cryptocurrency export unit consisting of 40 old Galaxy S5
30 October 2017   2673

A team of engineers from C-Lab, a subdivision of the South Korean giant Samsung, introduced a cryptocurrency export unit consisting of 40 old Galaxy S5 as part of the program for processing old smartphones called “Upcycling”. This is written by Motherboard. 

Galaxy S5 mining farm
Galaxy S5 mining farm

Engineers combined forty old Galaxy S5 smartphones and created for them an operating system optimized for the crypto currency mining. According to the developers, eight smartphones can work with much greater energy efficiency than a pc with medium performance characteristics.

Samsung Galaxy S5 mining farm
Samsung Galaxy S5 mining farm

Mining farm was presented at a developer conference in San Francisco. In the future, C-Lab plans to release free software that will "unlock the potential of older devices" even better.

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   965

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.