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H O W KNOWLEDGE IS YOUR BEST C Y B E R S E C U R I T Y DEFENSE H O R E A L LY W O R K S W C A H A N D S - O N G U I D E F O R Y T O T A L B E G I N N E R S B E R S A M G R U B B S E C U R I T Y R E A L L Y W O R K S G R U B B HOW CYBERSECURITY REALLY WORKS H O W C Y B E R S E C U R I T Y R E A L LY W O R K S A Hands-on Guide for Total Beginners by Sam Grubb San Francisco HOW CYBERSECURITY REALLY WORKS. Copyright © 2021 by Sam Grubb. All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage or retrieval system, without the prior written permission of the copyright owner and the publisher. ISBN-13: 978-1-7185-0128-7 (print) ISBN-13: 978-1-7185-0129-4 (ebook) Publisher: William Pollock Executive Editor: Barbara Yien Production Manager: Rachel Monaghan Production Editor: Dapinder Dosanjh Developmental Editor: Frances Saux Cover Illustrator: Gina Redman Interior Design: Octopod Studios Technical Reviewer: Cliff Janzen Copyeditor: Anne Marie Walker Compositor: Craig Woods, Happenstance Type-O-Rama Proofreader: Rachel Head For information on book distributors or translations, please contact No Starch Press, Inc. directly: No Starch Press, Inc. 245 8th Street, San Francisco, CA 94103 phone: 1.415.863.9900; [email protected] www.nostarch.com Library of Congress Cataloging-in-Publication Data Names: Grubb, Sam (Cyber security consultant), author. Title: How cybersecurity really works : a hands-on guide for total beginners / Sam Grubb. Description: San Francisco : No Starch Press, 2021. | Includes index. Identifiers: LCCN 2021004423 (print) | LCCN 2021004424 (ebook) | ISBN 9781718501287 (paperback) | ISBN 9781718501294 (ebook) Subjects: LCSH: Computer security. | Computer crimes--Prevention. | Computer networks--Security measures. Classification: LCC QA76.9.A25 G78 2021 (print) | LCC QA76.9.A25 (ebook) | DDC 005.8--dc23 LC record available at https://lccn.loc.gov/2021004423 LC ebook record available at https://lccn.loc.gov/2021004424 No Starch Press and the No Starch Press logo are registered trademarks of No Starch Press, Inc. Other product and company names mentioned herein may be the trademarks of their respective owners. Rather than use a trademark symbol with every occurrence of a trademarked name, we are using the names only in an editorial fashion and to the benefit of the trademark owner, with no intention of infringement of the trademark. The information in this book is distributed on an “As Is” basis, without warranty. While every precaution has been taken in the preparation of this work, neither the author nor No Starch Press, Inc. shall have any liability to any person or entity with respect to any loss or damage caused or alleged to be caused directly or indirectly by the information contained in it. To Shannon and Elliott, whose love and constant support gives me the confidence to do more than I ever imagined. About the Author Sam Grubb is a cybersecurity consultant and education advocate, as well as a former teacher, librarian, sandwich artist, and military helmet researcher. He currently works with companies and healthcare providers to ensure they are meeting both security and compliance needs. He believes nothing is too difficult to learn; you just need the right teacher. He enjoys reading, writing, and staying as far away from arithmetic as possible. He lives in Arkansas with his wife, son, two cats, and two dogs. About the Technical Reviewer Since the early days of Commodore PET and VIC-20, technology has been a constant companion to Cliff Janzen—and sometimes an obsession! Cliff is grateful to have the opportunity to work with and learn from some of the best people in the industry, including Sam and the fine people at No Starch Press. Cliff spends a majority of his workday managing and mentoring a great team of security professionals, striving to stay technically relevant by tackling everything from security policy reviews and penetration testing to incident response. He feels lucky to have a career that is also his favorite hobby and a wife who supports him.