For the operation of the payment system, the "Blockchain" technology is used (English blockchain, from block - "block" and chain "chain").
The name of the technology even gives you the vivid idea about its nature and the way it operates. It is basically a chain formed by different blocks that are like placed back to back to one another. This is why it is not easy to trace the transactions made with this technology because it is not easy to break this chain at all. Blockchain technology is the future of the world and that of currencies. People support it.