Final answer:
The key security issue in the design of any computer system is to prevent unauthorized privileges.
Step-by-step explanation:
A key security issue in the design of any computer system is to prevent, or at least detect, attempts by a user or a piece of malicious software from gaining unauthorized privileges on the system.
Computer system security involves safeguarding hardware, software, and data from unauthorized access, attacks, and damage. Measures include authentication, encryption, and access controls to protect against cyber threats. Firewalls and intrusion detection systems monitor and filter network traffic, while regular updates and patches address vulnerabilities. Antivirus software combats malicious code, and user education promotes safe online practices. Incident response plans mitigate damage in case of breaches. Physical security, such as biometric access and secure facilities, complements digital defenses. A comprehensive security strategy combines technology, policies, and user awareness to ensure the confidentiality, integrity, and availability of computer systems.