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System security involves protecting the system and its data from unauthorized ____. It ensures the confidentiality, integrity, and availability of ____. Authentication verifies the ____ of users or systems accessing the system. Authorization determines what actions and resources a user or system can ____ after successful authentication. Encryption converts data into a form that can only be understood by ____ parties. Protection against common attacks helps ____ vulnerabilities in the system. Please fill in the blanks with the appropriate words.