Chapter 1
Security Architecture
Course: Comptia Securityx Cas 005
Subject: Comptia Securityx Cas 005 Practice Exam
Chapter: Security Architecture
Cryptography and Public Key Infrastructure (PKI) play a critical role in meeting various security objectives by providing mechanisms to protect data confidentiality, integrity, and authenticity. They are foundational to securing communications, authenticating users and devices, and ensuring compliance with policies and regulations.
1. How Cryptography and PKI Support Security Objectives
a. Privacy and Confidentiality Requirements
- Description: Ensures that sensitive data remains private and is only accessible to authorized parties.
- Cryptography's Role:
Encryption is used to transform plaintext data into ciphertext, making it unreadable without the appropriate decryption key. Symmetric Encryption (e.g., AES) is often used for fast, bulk data encryption, while Asymmetric Encryption (e.g., RSA) is used for secure key exchange. Real-Life Example: A financial institution uses encryption to protect customer data stored in its databases and transmitted over the network.
- Encryption is used to transform plaintext data into ciphertext, making it unreadable without the appropriate decryption key.
- Symmetric Encryption (e.g., AES) is often used for fast, bulk data encryption, while Asymmetric Encryption (e.g., RSA) is used for secure key exchange.
- Real-Life Example: A financial institution uses encryption to protect customer data stored in its databases and transmitted over the network.
- PKI's Role:
Digital Certificates issued by a trusted Certificate Authority (CA) are used to ensure secure communications by enabling encryption and secure key exchange protocols (e.g., HTTPS using TLS/SSL). Example: A website uses an SSL/TLS certificate to encrypt communications between the server and a user's browser, protecting sensitive data such as passwords.
- Digital Certificates issued by a trusted Certificate Authority (CA) are used to ensure secure communications by enabling encryption and secure key exchange protocols (e.g., HTTPS using TLS/SSL).
- Example: A website uses an SSL/TLS certificate to encrypt communications between the server and a user's browser, protecting sensitive data such as passwords.