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Welcome to Hacking For Dummies, 7th Edition. This book outlines — in plain English — computer hacking tricks and techniques that you can use to assess the security of your information systems, find the vulnerabilities that matter, and fix the weaknesses before criminal hackers and malicious insiders take advantage of them. This hacking is the professional, aboveboard, and legal type of security testing — which I refer to as vulnerability and penetration testing or ethical hacking throughout the book. Computer and network security is a complex subject and an ever-moving target. You must stay on top of it to ensure that your information is protected from the bad guys and their exploits, including the growing challenges associated with ransomware. The techniques and tools outlined in this book can help. You could implement all the security technologies and other best practices possible, and your network environment might be secure — as far as you know. But unless and until you understand how malicious attackers think, apply that knowledge, and use the right tools to assess your systems from their point of view, it’s practically impossible to have a true sense of how secure your systems and information really are. Ethical hacking (or, more simply, security assessments), which encompasses formal and methodical vulnerability and penetration testing, is necessary to find security flaws and to validate that your information systems are truly secure on an ongoing basis. Given the COVID-19 situation, ensuring security is especially critical today. With so many people working from home and outside the traditional enterprise network security controls, hacking and related breaches are off the charts. It’s clear that businesses are having to adapt to new ways of working. IT and security professionals are also grappling with the associated emerging technologies, and that’s only further complicating security. It’s a tricky place to be and not an enviable position. Still, it represents an opportunity for learning and improving, so it’s not all bad.