Hackers are those individuals who gain access to computers or networks without official permission. In this intriguing resource, readers learn the differences among white hat, black hat, and gray hat hackers and their ways of working concerning computer networks today. The origins and history of hacker culture are examined, as are the law enforcement methods of catching criminals. Some of the topics covered are the motives for hacking, black hat targets, online hazards, malware programs, and typical hacker techniques. Government-sponsored hacking in cyber warfare efforts, hacktivism, and famous hackers are also reviewed.