Responses should be no longer than half a page, below each corresponding topic.

1. Access controls are security features that are usually considered the first line of defense in

asset protection. They are used to dictate how subjects access objects, and their main goal is to

protect the objects from unauthorized access.

These controls can be administrative, physical, or technical in nature and should be applied in a

layered approach, ensuring that an intruder would have to compromise more than one

countermeasure to access critical assets. Explain each of these controls of administrative,

physical, and technical with examples of real-world applications.

2. Access control defines how users should be identified, authenticated, and authorized. These

issues are carried out differently in different access control models and technologies, and it is up

to the organization to determine which best fits its business and security needs. Explain each of

these access control models with examples of real-world applications.

3. The architecture of a computer system is very important and comprises many topics. The

system has to ensure that memory is properly segregated and protected, ensure that only

authorized subjects access objects, ensure that untrusted processes cannot perform activities

that would put other processes at risk, control the flow of information, and define a domain of

resources for each subject. It also must ensure that if the computer experiences any type of

disruption, it will not result in an insecure state. Many of these issues are dealt with in the

system’s security policy, and the security model is built to support the requirements of this

policy. Given these definitions, provide an example where you could better design computer

architecture to secure the computer system with real-world applications. You may use fictitious

examples to support your argument.

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