42 Applications as a service, featuring application programming interface software to facilitate development and sharing of software applications, database applications and distributed ledger applications; issuing digital signatures to authorised users of data networks; authentication services; authentication services, in particular creation of automated verification systems; authentication services (control) of data transmitted via telecommunications; authentication services for computer security; authentication of data transmitted via telecommunications; authentication of messages transmitted via telecommunications; user authentication services using technology for transactions; provision of security services for computer networks, computer access and computerised transactions; providing of non-downloadable software enabling the development and use of distributed ledger software applications or database software applications, and software for encryption, decryption and authentication of information, news and data; certification services of data transmitted via telecommunications; blockchain as a service [baas]; computerised data backup, computerised retrieval of data; computer programming services for electronic data security; computer security services in the nature of administering digital certificates; computer services concerning electronic data storage; certification of data via blockchain; data storage via blockchain; data encryption services; mobile information and communication technology security; certification centre services for electronic signatures; certification provider services; technological and computer services relating the security of computer data and personal and financial information; digitization of documents; providing user authentication services using single sign-on technology for online software applications; electronic data storage and data back-up services; electronic storage of documents; electronic storage services for archiving databases, images and other electronic data; development, care, maintenance and updating of computer systems for processing payments with virtual currency; development of data bases; software development, programming and implementation; development of software for communication systems; design and development of information technology systems for the creation and storage of proofs of identity or references using decentralised protocols with blockchain and distributed ledger technologies; creation of electronic signatures; development of strategies and methods for ensuring security in information and communication technology; computer programming; hosting of computer sites (websites); software as a service [saas]; rental of software; hosting services, including providing a web hosting platform for users to develop and share software applications, database applications and distributed ledger applications; hosting of digital content on the internet; hosting platforms on the internet; computer services for encoding, decoding and authenticating information, messages and data, including the aforesaid services in the form of automated contracts relating to the use of platforms and protocols with blockchain and distributed ledger technology; IT security services in the nature of protection and recovery of computer data; providing on-line non-downloadable software for digitally signing electronic files, photos and other electronic documents; provision of paas services (platform as a service), including providing an on-line community for users to develop and share applications built on a distributed ledger software platforms or database software platforms; testing, authentication and quality control; testing, analyzing, evaluate, relating to the following sectors, files, relating to certification purposes; software as a service [saas] for recording financial and non-financial data and information to encrypted ledgers [books] or shared encrypted ledgers, managing digital identity information and automating legal transactions; verification and establishment of the identity and access rights of users of information networks; monitoring the security of data transmission; certification services of messages transmitted via telecommunications; hosting software for use by others for clearing the settlement of financial assets and transactions