Salah satu prinsip dasar keamanan yang membuat (OS berbasis) Linux dan Windows berbeda:
Any software, hardware, or user should be allowed only to use absolutely necessary system resources — and no more. The least access, the less chance of providing an unexpected entrance for intrusions. This principle is the most widely acknowledged among experts, and applies almost everywhere. A relevant modern example is the use of encryption so that data stored in cloud storage can only be read by the owner, and not the company providing the storage.