cloud computing; cloud seeding; providing virtual computer systems through cloud computing; platform as a service (paas); hosting of software as a service (saas); software as a service (saas); development of computer based networks; development of computer software; software creation; information technology (it) services (computer hardware, software and peripherals design and technical consultancy); user authentication services using single sign-on technology for online software applications; software development in the framework of software publishing; development of computer platforms; development of computer software application solutions; cryptocurrency engineering; cryptographic engineering; data encryption services; data cryptology services; digital signature verification services (electronic cryptology services); diamond authentication and certification services; electronic signature verification services (electronic cryptology services); computer security engineering; data security consultancy; gemstone authentication and certification services; computer firewall services; authentication, issuance and validation of digital certificates; data security services (firewalls); cryptanalysis services; computer software advisory services; upgrading of computer software; installation of computer software; updating of computer software; design of computer software; maintenance of computer software; installation of middleware (software); repair of computer software; development of software; writing of computer software; rental of computer software; advisory services relating to computer software; computer software programming services; computer software engineering; software engineering; computer software design; computer software consultancy; computer software development