AppCoins to launch Aptoide sidechain feature

A successful European app store Aptoide with 200 million unique users will enable sidechain feature on June 15
28 May 2018   1947

AppCoins ecosystem is releasing Aptoide with sidechain/payments channels on June 15. This "Knuth release" follows the footsteps of the previous "Gosling release". As the Gosling release introduced a first glance at an Aptoide app store, the Knuth is going to complement the Gosling with sidechain/payments channels.

While these 2 features will allow scalability of the AppCoins ecosystem as a whole, the release will include the first support of apps vetting using AppCoins reputation system. In the long run, the ecosystem is envisioned to be formed by a community of app stores that adopt the AppCoins cryptocurrency.

At the moment of publication, AppCoins market characteristics are as follows:

Average price 0.316094 USD
Market cap 31,626,568 USD
Volume (24H) 978,747 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   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.