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Questions and Answers
What is the primary goal of the principle of Least Privilege in software security design?
What is the primary goal of the principle of Least Privilege in software security design?
What is an example of the Defense In Depth principle in software security design?
What is an example of the Defense In Depth principle in software security design?
What is the main benefit of Separation Of Concerns in software security design?
What is the main benefit of Separation Of Concerns in software security design?
What is an example of the Fail-Safe Defaults principle in software security design?
What is an example of the Fail-Safe Defaults principle in software security design?
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What is the main goal of the Economy Of Mechanism principle in software security design?
What is the main goal of the Economy Of Mechanism principle in software security design?
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What is the principle that recognizes a system is only as secure as its weakest component?
What is the principle that recognizes a system is only as secure as its weakest component?
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What is the primary goal of the Separation Of Concerns principle in software security design?
What is the primary goal of the Separation Of Concerns principle in software security design?
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What is an example of the Principle of Least Privilege in software security design?
What is an example of the Principle of Least Privilege in software security design?
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What is the main benefit of the Defense In Depth principle in software security design?
What is the main benefit of the Defense In Depth principle in software security design?
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What is the purpose of the Economy Of Mechanism principle in software security design?
What is the purpose of the Economy Of Mechanism principle in software security design?
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Study Notes
Software Security Design Principles
Least Privilege
- Granting only the minimum privileges and access required for a user or system to perform their tasks
- Reducing the attack surface by limiting the potential damage that can be done
- Examples:
- Running a process with a non-administrative account
- Restricting access to sensitive data and resources
Defense In Depth
- Implementing multiple layers of security controls to protect against different types of attacks
- Providing redundancy and backup systems in case one layer is compromised
- Examples:
- Firewalls, intrusion detection systems, and encryption
- Implementing both username/password authentication and two-factor authentication
Separation Of Concerns
- Dividing a system into separate components, each handling a specific task or function
- Reducing the complexity and potential vulnerabilities of a single component
- Examples:
- Separating authentication and authorization logic
- Using microservices architecture to separate functionality
Fail-Safe Defaults
- Designing systems to default to a secure state in the event of a failure
- Ensuring that the system fails in a way that prevents unauthorized access or data breaches
- Examples:
- Automatically logging out users after a period of inactivity
- Defaulting to a secure configuration in the event of a system failure
Economy Of Mechanism
- Minimizing the complexity of security mechanisms to reduce the potential for errors and vulnerabilities
- Using simple, well-tested, and widely-used security mechanisms
- Examples:
- Using established encryption algorithms instead of custom implementations
- Implementing a simple, role-based access control system
Principle of Weakest Link
- Recognizing that a system is only as secure as its weakest component
- Focusing on securing the most vulnerable components first
- Examples:
- Identifying and prioritizing the most critical vulnerabilities to patch
- Implementing additional security measures to protect sensitive data
Authentication and Authorization
- Authentication: verifying the identity of a user or system
- Authorization: determining what actions a user or system is allowed to perform
- Examples:
- Using username/password authentication and role-based access control
- Implementing multi-factor authentication and attribute-based access control
Software Security Design Principles
Least Privilege
- Grants minimum privileges and access required for a user or system to perform tasks
- Reduces attack surface by limiting potential damage
- Examples: running processes with non-admin accounts, restricting access to sensitive data and resources
Defense In Depth
- Implements multiple layers of security controls to protect against different types of attacks
- Provides redundancy and backup systems in case one layer is compromised
- Examples: firewalls, intrusion detection systems, encryption, username/password and two-factor authentication
Separation Of Concerns
- Divides a system into separate components, each handling a specific task or function
- Reduces complexity and potential vulnerabilities of a single component
- Examples: separating authentication and authorization logic, using microservices architecture
Fail-Safe Defaults
- Designs systems to default to a secure state in the event of a failure
- Ensures that the system fails in a way that prevents unauthorized access or data breaches
- Examples: automatically logging out users after inactivity, defaulting to secure configuration in system failure
Economy Of Mechanism
- Minimizes complexity of security mechanisms to reduce errors and vulnerabilities
- Uses simple, well-tested, and widely-used security mechanisms
- Examples: using established encryption algorithms, implementing simple role-based access control
Principle of Weakest Link
- Recognizes that a system is only as secure as its weakest component
- Focuses on securing the most vulnerable components first
- Examples: identifying and prioritizing critical vulnerabilities, implementing additional security measures for sensitive data
Authentication and Authorization
- Authentication: verifies the identity of a user or system
- Authorization: determines what actions a user or system is allowed to perform
- Examples: username/password authentication and role-based access control, multi-factor authentication and attribute-based access control
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Description
Learn about software security design principles, including least privilege and defense in depth, to protect against various types of attacks.
