Ключевые слова: abstract, access, app, background, banking, bitcoin, block, blockchain, blue, business, chain, code, commerce, computer, concept, connection, crypto, currency, data, digital, electronic, exchange, finance, graphic, innovation, internet, investment, lock, media, modern, network, online, privacy, protection, science, screen, secure, security, sign, software, symbol, technology, trade, transaction, virtual, web,