User authentication services using blockchain technology; software as a service; platform as a Service; development of virtual reality software; design and development of computer software; technological research; providing online non downloadable software; data encryption services; user authentication services using technology for e-commerce transactions; information technology consultancy; development of computer platforms; providing virtual computer systems through cloud computing; design and development of computer hardware; updating of computer software; developing of driver and operating system software; electronic monitoring of credit card activity to detect fraud via the internet; user authentication services using single sign-on technology for online software applications; consulting services in the field of cloud computing; computer system analysis; computer programming