42 Advisory and consultancy services relating to computer hardware, computer software, computer programming or information technology, in particular information technology security; computer software design, the aforesaid software in particular for internet security, securely storing data, transmitting data, authentication purposes, application control, device control, bitlocker management, data access governance, digital signatures, authentication, encryption or cryptography; computer software consultancy; updating of computer software; rental of computer software; maintenance of computer software; issuing, examining or administration of digital signatures; software development, the aforesaid software development in particular for internet security, securely storing data, transmitting data, authentication purposes, application control, device control, bitlocker management, data access governance, digital signatures, authentication, encryption, cryptography, or zero trust platforms; software adaptation; design services relating to computer software; upgrading of computer software; programming of software, the aforesaid software in particular for internet security, securely storing data, transmitting data, authentication purposes, application control, device control, bitlocker management, data access governance, digital signatures, authentication, encryption, cryptography, or zero trust platforms; hosting zero trust platforms.