Cybersecurity Architecture: Fundamentals of Confidentiality, Integrity, and Availability
Welcome and Introduction
In this section, the speaker introduces the topic of Confidentiality, Integrity, and Availability (CIA) in cybersecurity architecture.
Understanding Confidentiality
- Authentication and authorization are key components of access control.
- Authentication verifies the user's identity while authorization determines their permissions.
- Multifactor authentication enhances security by using multiple verification methods.
- Role-based access control ensures users have appropriate privileges for their actions.
- Unauthorized users are blocked from accessing sensitive information through authentication checks.
Ensuring Confidentiality with Encryption
- Encryption plays a vital role in maintaining confidentiality by securing messages.
- Symmetric encryption uses a shared key for both encryption and decryption processes.
Exploring Integrity
This section delves into the concept of Integrity within cybersecurity architecture.
Maintaining Data Integrity
- Logging activities like login attempts and transactions help track system interactions.
- Cryptographic functions such as digital signatures detect unauthorized modifications to data.
Leveraging Blockchain for Integrity
Immutable Systems and Security Measures
The speaker discusses the importance of immutability in systems to prevent unauthorized changes and introduces cryptographic technologies for maintaining integrity and confidentiality.
Immutable Systems
- Emphasizes the need for immutability in systems to prevent unauthorized alterations.
- Describes scenarios where bad actors attempt to modify or delete records, highlighting the necessity of blocking such actions using cryptographic technologies.
- Explains how cryptographic technologies can detect and block attempts to modify records, ensuring data integrity.
Ensuring Availability in Systems
The focus shifts to system availability, emphasizing the importance of resources being accessible to authorized users when needed.
System Availability
- Defines availability as ensuring resources are accessible to authorized users promptly.
- Illustrates a scenario where a bad actor floods a system with transaction requests, causing a denial of service by overwhelming legitimate traffic.
- Explores distributed denial of service attacks where multiple controlled systems flood a server, amplifying the impact.
Guarding Against Denial of Service Attacks
Delving into denial of service attacks, particularly focusing on SYN floods as an example.
Denial of Service Attacks
- Discusses SYN floods as a type of denial of service attack that exploits TCP session setup vulnerabilities.
- Details how attackers send SYN messages without completing the three-way handshake, depleting server resources and causing system unavailability.
Do I have integrity checking so that if someone modifies it or tampers with it, I can be aware of that and know to adjust my trust level? And do I have the system available all the time that it's supposed to be available? This is the CIA triad. If I've covered all of these three bases, then it's job done.
The speaker discusses the importance of integrity checking, system availability, and the CIA triad in ensuring security.
Importance of Security Measures
- Ensuring integrity checking to detect modifications or tampering -
- Maintaining system availability as per requirements -