Definition
Public Cloud is the cloud model in which infrastructure and services are provided by an external supplier (AWSAmazon Web Services - Amazon's cloud platform with over 200 services; the leading cloud provider globally and widely used in the Norwegian energy sector., AzureMicrosoft's cloud platform - strong in the enterprise segment, especially where Office 365 and Active Directory are already in use., GCPGoogle Cloud Platform - Google's cloud platform, particularly strong in data and machine learning.) and shared among many customers. The customer does not own the hardware but rents capacity on demand. Public Cloud offers high scalability and lower capital expenditure, but raises questions of data sovereignty - particularly relevant in critical infrastructureSystems and facilities necessary for society's basic functions - including power supply, water systems, telecommunications, and transport. such as energy under NIS2EU directive on network and information security - imposes strict security requirements on critical infrastructure..