42 Engineering services for communication technology and cryptography; encryption, decryption and authentication of information, messages and data; engineering services for quantum cryptography, quantum communication and quantum key distribution; technological services for quantum cryptography, quantum communication and quantum key distribution; engineering services, namely, counselling, in the fields of quantum cryptography, quantum communication and quantum key distribution; development of hardware and software for quantum cryptography, quantum communications and quantum key distribution; software development, programming and implementation; rental of science and technology equipment; IT consultancy, advisory and information services; letting of quantum cryptography installations and hardware, quantum key distribution installations and hardware; rental of computer hardware and facilities; hosting services, software as a service, and rental of software; scientific research, especially with regard to quantum cryptography; quantum key distribution; research and development services, especially, in the fields of quantum cryptography, quantum communication and quantum key distribution; conducting feasibility studies, especially in the field of quantum cryptography, quantum communication and quantum key distribution; professional engineering advisory services, in the fields of quantum cryptography, quantum communication and quantum key distribution; technical consultancy and technical research, especially, in the fields of quantum cryptography, quantum communication and quantum key distribution; scientific and technological services and research and design relating thereto; quality control and authentication services; IT security, protection and restoration; IT services; counselling, relating to the following sectors: cryptography, cryptographic algorithms, crypto analysis and security software, key generation; all the aforesaid services, in particular relating to quantum cryptographic applications or using quantum cryptography or quantum key distribution applications or using quantum key distribution; key generation; entangled photon key generation services; key generation services for cryptography; cryptography services by means of satellites