42 Authentication of data in the field of financial transaction using blockchain technology; Electronic storage of cryptocurrency for others; Platform as a service (PAAS) featuring computer software platforms for cryptocurrency trading, secure and transparent data storage, decentralized finance, development of Ethereum ERC20 tokens and DApps; Providing on-line non-downloadable computer software for use as a cryptocurrency wallet; Providing virtual computer systems and virtual computer environments through cloud computing; Software as a service (SAAS) services featuring software for cryptocurrency trading, secure and transparent data storage, decentralized finance, development of Ethereum ERC20 tokens and DApps; Software design and development