Blockchain as a service [BaaS]; User authentication services using blockchain technology; Hosting of blockchain databases; Cryptographic engineering; Cryptomining; Data cryptology services; Hosting of digital e-commerce platforms for the trading of digital assets; Providing virtual computer systems through cloud computing; Software as a service (SaaS); Platform as a Service (PaaS); Provision of online non-downloadable software (application service provider); Information technology (IT) consultancy