42 Computer systems analysis in the field of e-commerce related to platforms based on blockchain technology and smart contracts; recovery of computer data in the field of e-commerce particularly in the field of platforms based on blockchain technology and smart contracts; computer antivirus services in the field of e-commerce, namely, providing temporary use of non-downloadable computer anti-virus software in the nature of platforms based on blockchain technology and smart contracts; software installation in the field of e-commerce, in particular, installation of platforms based on blockchain technology and smart contracts; advice on design for websites being web site design consultancy in the field of e-commerce, in particular, platforms based on blockchain technology and smart contracts; computer consulting being computer software consultancy in the field of e-commerce, in particular, in the field of platforms based on blockchain technology and smart contracts; consulting with respect to the design and development of computer hardware in the field of e-commerce for platforms based on blockchain technology and smart contracts; consultancy with respect to internet security in the field of e-commerce, in particular, in the field of platforms based on blockchain technology and smart contracts; advice on computer software in the field of e-commerce for platforms based on blockchain technology and smart contracts; consulting with respect to data security in the field of e-commerce, particularly in the field of platforms based on blockchain technology and smart contracts; software updating in the field of e-commerce, in particular, updating of computer software in the nature of platforms based on blockchain technology and smart contracts; monitoring of computer systems in the field of e-commerce, namely, platforms based on blockchain technology and smart contracts, by remote access to detect malfunctioning; monitoring of computer systems in the field of e-commerce, namely, monitoring of platforms based on blockchain technology and smart contracts for detecting unauthorized access or data loss; software as a service [SaaS] for building and running distributed applications in the field of e-commerce, in particular, platforms based on blockchain technology and smart contracts; maintenance of software in the field of e-commerce, in particular, maintenance of software platforms based on blockchain technology and smart contracts; provision of information on computer technology and programming via a website in the field of e-commerce, particularly in the field of platforms based on blockchain technology and smart contracts; provision of search engine tools for the Internet in the field of e-commerce for blockchain technology and smart contracts; platform as a service [PaaS] in the field of e-commerce, namely, platforms as a service for building and running distributed applications based on blockchain and smart-contracts technology; transformation of computer programs and data, except for physical conversion, in the field of e-commerce, namely, conversion of computer platforms based on blockchain technology and smart contracts, other than physical conversion; design of computer systems in the field of e-commerce, in particular, design of platforms based on blockchain technology and smart contracts; rental of web servers in the field of e-commerce, in particular, rental of platforms based on blockchain technology and smart contracts; rental of computer software in the field of e-commerce, particularly, blockchain technology and smart contracts; hosting computer websites in the field of e-commerce, in particular, hosting website platforms based on blockchain technology and smart contracts; hosting servers in the field of e-commerce, in particular, platforms based on blockchain technology and smart contracts; computer software design in the field of e-commerce, in particular, platforms based on blockchain technology and smart contracts; creation and design of information indices on the web for others being information technology services in the field of e-commerce, particularly related to platforms based on blockchain technology and smart contracts; creation and maintenance of websites for others in the field of e-commerce, in particular, website platforms based on blockchain technology and smart contracts; computer programming in the field of e-commerce, particularly related to platforms based on the blockchain technology and smart contracts; duplication of computer programs in the field of e-commerce, namely, duplication of computer platforms based on blockchain technology and smart contracts; cloud computing in the field of e-commerce, namely, cloud computing featuring software platforms for building and running distributed applications based on blockchain technology and smart contracts; services of a provider of outsourced computer services in the field of e-commerce, namely, outsource service providers in the field of information technology particularly related to platforms based on blockchain technology and smart contracts; external data protection in the nature of computer security threat analysis for protecting data in the field of e-commerce, particularly related to platforms based on blockchain technology and smart contracts; computer technology consulting in the field of e-commerce, particularly in the field of platforms based on blockchain technology and smart contracts; data encryption services in the field of e-commerce, particularly related to platforms based on blockchain technology and smart contracts; electronic data storage in the field of e-commerce, particularly related to platforms based on the blockchain technology and smart contracts; electronic monitoring of credit-card activity for detecting online fraud in the field of e-commerce, in particular, on platforms based on the blockchain technology and smart contracts; electronic monitoring of personal data being personally identifying information for detection of identity theft via the Internet in the field of e-commerce, particularly on platforms based on blockchain technology and smart contracts