комп / comp: Квантовый блокчейн

Quantum blockchain.

metalcrue 22.12.19 в 15:57

The physicists from the Russian quantum center launched a quantum blockchain for the first time in 2017 — a tool for creating a distributed database in which it is almost impossible to forge the records. The mission of the quantum blockchain is to protect classical circuits from the appearance of a quantum computer.

metalcrue 22.12.19 в 16:01

A blockchain is a database in which blocks of information follow each other, organized in a strictly defined way. These blocks are stored on the computers of all users who exchange data within the blockchain. Like information encryption methods, blockchain has proved vulnerable to quantum computers. Quantum algorithms are able to outperform conventional computers in solving some problems. If one of the nodes of the blockchain network becomes a quantum computer, it will be able to forge the electronic signatures of users conducting transactions and the signatures of the authors of blocks.

metalcrue 22.12.19 в 16:08

The authors of the new work implemented the concept of blockchain, which is based on the quantum key distribution. The peculiarity of the concept is that transactions are confirmed in the system automatically, so there is no need for a digital signature. Its role is played by a quantum communication channel that prohibits eavesdropping on the encryption key and forgery of messages.

metalcrue 22.12.19 в 16:09

Due to this, all network participants know exactly who is the author of the transaction. The disadvantage of quantum blockchain is that all nodes of the network must be connected in pairs by quantum communication channels. At the same time, such system is scalable and will remain safe even in the event of a sharp development of quantum technologies.

metalcrue 22.12.19 в 16:11