Gulden to release Proof-of-Word-and-Witness algorithm

PoW^2 along with SegSig and Sonic are to be released on June 28 by Gulden to improve network security and transaction speed
26 June 2018   1247

Gulden is ready to launch its improved PoW^2 algorithm on June 28. It is claimed to greatly increase the Gulden blockchain security and allows to earn Gulden by participating as Witness. Along with the algorithm, a Segregated Signature concept is also implemented along. The concept is going to improve space consumption on the blockchain of the most transaction types.

Last but not least - Sonic, will allow new users to use Gulden wallet within a matter of minutes without long synchronization wait. The development progress of the PoW^2, SegSig and Sonic can be traced here. Gulden is a blockchain-based payment system that allows users to send money to each other, wire it to any IBAN account, pay at Gulden merchants and get a return. At the moment of publication, Gulden (NLG) market indicators are as follows:

Average price 0.069090 USD
Market cap 27,630,832 USD
Volume (24H) 98,686 USD

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   1039

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.