Horizen is testing a private method of countering “the attack 51%”
Platform developers Horizen claim that they managed to find a way to counter the famous “attack 51%.” This fact can without exaggeration be called the result of its own bitter experience — that this attack at the time the platform was worth more than $500 thousand.
As you know, the success of the “attack of 51%” — getting the attacker or group of attackers control over more than half of the nodes of a distributed registry in a particular blockchain. This gives you the opportunity to make the blockchain any information and verify it, for example, creating new units in unlimited quantities, imbuing them with any transactions.
What offers to do with Horizen? And she offers to make changes to the algorithm of a consensus proof-of-work with so-called “delay function”. That is, miners that could, in theory to prepare such an attack, will receive penalties.
The fact that implementation of the “attack 51%” takes time — the miner-the attacker needs to secretly make a number of blocks before transfer them into the blockchain. And the penalties for the delay of the new blocks in the blockchain will make the process too expensive.
Technically, the new edition of the code changes the function of the underlying consensus algorithm, the so-called “rule of the longest chain”. For example, penalties apply if the proposed new unit is only five blocks from the most recently created. “The attempt of such an attack will be much more expensive, 10 times more expensive”, — says the co-founder of Horizen Rob the vil’on.
In his opinion, a successful “attack 51%” caused damage not only to the projects where they were successful, but Scripturally as a whole because it questioned the reliability of the technology and undermine its credibility.
The vil’on also noted that the developers Horizen began to think over the solution of this problem immediately after the attack takes place on their own platform, which resulted in the emergence of 36 fake blocks. “I think we’ve got quite an elegant and simple solution that ensures that this is unlikely to be repeated, he said. — Too much will cost now such attempt”.
Because of the nature of architecture Horizen, a delay of 5 units and more can be attributed solely to the hostile intentions. “One block is calculated on average for 2.5 minutes, to register the new unit online requires 1-2 seconds from anywhere in the world. That is, no reasonable reasons why there is a gap of 5 blocks from the most recently created,” — said the vil’on. However, then the situation may arise when different block chains will compete with each other, but the question to be resolved by a vote of the miners.
As reported Hash#Telegraph earlier, Horizen is the result of the rebranding of the platform ZenCash. The project team promised that it will be focused on creation of complete applications that enhance the anonymity of transactions and will offer the community new features, like on-chain Treasury Fund, proceeds of which will be spent on the development of the Horizen.
On the platform will appear sydeny with smart contracts, but the Ticker cryptocurrencies (ZEN) will not change.
The platform was still called ZenCash, came under attack in early June. 51Crypto, a resource, a measure of the cost of conducting the attack 51% for various services, estimated that the ZenCash hacking hacker cost only $30 thousand