Book Image

CompTIA Security+ Certification Guide

By : Ian Neil
Book Image

CompTIA Security+ Certification Guide

By: Ian Neil

Overview of this book

CompTIA Security+ is a worldwide certification that establishes the fundamental knowledge required to perform core security functions and pursue an IT security career. CompTIA Security+ Certification Guide is a best-in-class exam study guide that covers all of CompTIA Security+ 501 exam objectives. It is authored by Ian Neil, who is a world-class trainer of CompTIA Security+ 501. Packed with self-assessment scenarios and realistic exam questions, this guide will help you master the core concepts to succeed in the exam the first time you take it. Using relevant examples, you will learn all the important security fundamentals from Certificates and Encryption to Identity and Access Management concepts. You will then dive into the important domains of the exam; namely, threats, attacks and vulnerabilities, technologies and tools, architecture and design, risk management, and cryptography and Public Key Infrastructure (PKI). This book comes with over 600 practice questions with detailed explanation that is at the exam level and also includes two mock exams to help you with your study plan. This guide will ensure that encryption and certificates are made easy for you.
Table of Contents (18 chapters)
12
Mock Exam 1
13
Mock Exam 2
15
Acronyms

Symmetric v Asymmetric Analogy

If we think of encryption as playing table tennis where each person has just one bat and the pace is extremely fast, this is similar to asymmetric encryption as it uses one key.

Then, if we change the game and we give the players two bats – the first bat to stop the ball and the second bat to turn the ball – this would be much slower.

The same can be said for encryption; asymmetric encryption is much more secure as it has two keys and uses DH, an asymmetric technique for setting up a secure tunnel for the symmetric data. Symmetric encryption uses a block cipher and encrypts large blocks of data much faster than the asymmetric technique.

XOR Encryption

The binary operation Exclusive...