सूचना और डेटाबेस सुरक्षा में, 'प्रमाणीकरण' (Authentication) मुख्य रूप से निम्नलिखित में से किसे संदर्भित करता है?

A string of characters used to grant access to a computer system is called a:

Which one of the following statements is FALSE regarding Discretionary Access Control (DAC)?

What is the most appropriate description for the security term 'confidentiality'?