42 Authentication services for electronic documents and e-mail; blockchain as a service [BaaS]; computer security services; computer software design; data security services; design, development and programming of computer software; design and development of search engines; design of communication systems; development of systems for the storage of data; electronic data storage; electronic monitoring of financial transactions and activities to detect suspicious, fraudulent or unlawful transactions and activities; hosting of blockchain databases; providing search engines for the internet; providing Internet search engines.