Chapter 1
IT Concepts and Terminology
Course: Comptia Tech Fc0 U71
Subject: Comptia Tech Fc0U71
Chapter: Security
Encryption is a critical mechanism for ensuring confidentiality, integrity, and authenticity of data. It transforms readable data (plaintext) into unreadable formats (ciphertext) using cryptographic algorithms and keys. The primary goal is to prevent unauthorized access, especially in the event of data leakage or interception.
1. Plain Text vs. Cipher Text
Plaintext
- Definition: Plaintext refers to any data in its original, unencrypted format. It is human-readable and understandable without the need for any cryptographic process.
- Risks: If plaintext is intercepted, anyone who obtains access can immediately view, alter, or misuse the information. This makes plaintext a major liability in any system transmitting or storing sensitive data.
Examples of plaintext:
- Usernames, passwords, or credit card numbers stored in log files or transmitted via unsecured channels (e.g., HTTP).
- Configuration files with hard-coded credentials.