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A security hacker is someone who seeks to breach defenses and exploit weaknesses in a computer system or network. Hackers may be motivated by a multitude of reasons, such as profit, protest, information gathering, challenge, recreation, or to evaluate system weaknesses to assist in formulating defenses against potential hackers. The subculture that has evolved around hackers is often referred to as the computer underground.
There is a longstanding controversy about the term's true meaning. In this controversy, the term hacker is reclaimed by computer programmers who argue that it refers simply to someone with an advanced understanding of computers and computer networks, and that cracker is the more appropriate term for those who break into computers, whether computer criminal (black hats) or computer security expert (white hats). A 2014 article concluded that "... the black-hat meaning still prevails among the general public".[tone]
- 1 History
- 2 Classifications
- 3 Attacks
- 4 Notable intruders and criminal hackers
- 5 Notable security hackers
- 6 Customs
- 7 Consequences for malicious hacking
- 8 Hacking and the media
- 9 See also
- 10 References
- 11 Further reading
- 12 External links
In computer security, a hacker is someone who focuses on security mechanisms of computer and network systems. While including those who endeavor to strengthen such mechanisms, it is more often used by the mass media and popular culture to refer to those who seek access despite these security measures. That is, the media portrays the 'hacker' as a villain. Nevertheless, parts of the subculture see their aim in correcting security problems and use the word in a positive sense. White hat is the name given to ethical computer hackers, who utilize hacking in a helpful way. White hats are becoming a necessary part of the information security field. They operate under a code, which acknowledges that breaking into other people's computers is bad, but that discovering and exploiting security mechanisms and breaking into computers is still an interesting activity that can be done ethically and legally. Accordingly, the term bears strong connotations that are favorable or pejorative, depending on the context.
The subculture around such hackers is termed network hacker subculture, hacker scene or computer underground. It initially developed in the context of phreaking during the 1960s and the microcomputer BBS scene of the 1980s. It is implicated with 2600: The Hacker Quarterly and the alt.2600 newsgroup.
In 1980, an article in the August issue of Psychology Today (with commentary by Philip Zimbardo) used the term "hacker" in its title: "The Hacker Papers". It was an excerpt from a Stanford Bulletin Board discussion on the addictive nature of computer use. In the 1982 film Tron, Kevin Flynn (Jeff Bridges) describes his intentions to break into ENCOM's computer system, saying "I've been doing a little hacking here". CLU is the software he uses for this. By 1983, hacking in the sense of breaking computer security had already been in use as computer jargon, but there was no public awareness about such activities. However, the release of the film WarGames that year, featuring a computer intrusion into NORAD, raised the public belief that computer security hackers (especially teenagers) could be a threat to national security. This concern became real when, in the same year, a gang of teenage hackers in Milwaukee, Wisconsin, known as The 414s, broke into computer systems throughout the United States and Canada, including those of Los Alamos National Laboratory, Sloan-Kettering Cancer Center and Security Pacific Bank. The case quickly grew media attention, and 17-year-old Neal Patrick emerged as the spokesman for the gang, including a cover story in Newsweek entitled "Beware: Hackers at play", with Patrick's photograph on the cover. The Newsweek article appears to be the first use of the word hacker by the mainstream media in the pejorative sense.
Pressured by media coverage, congressman Dan Glickman called for an investigation and began work on new laws against computer hacking. Neal Patrick testified before the U.S. House of Representatives on September 26, 1983, about the dangers of computer hacking, and six bills concerning computer crime were introduced in the House that year. As a result of these laws against computer criminality, white hat, grey hat and black hat hackers try to distinguish themselves from each other, depending on the legality of their activities. These moral conflicts are expressed in The Mentor's "The Hacker Manifesto", published 1986 in Phrack.
Use of the term hacker meaning computer criminal was also advanced by the title "Stalking the Wily Hacker", an article by Clifford Stoll in the May 1988 issue of the Communications of the ACM. Later that year, the release by Robert Tappan Morris, Jr. of the so-called Morris worm provoked the popular media to spread this usage. The popularity of Stoll's book The Cuckoo's Egg, published one year later, further entrenched the term in the public's consciousness.
Several subgroups of the computer underground with different attitudes use different terms to demarcate themselves from each other, or try to exclude some specific group with whom they do not agree.
Eric S. Raymond, author of The New Hacker's Dictionary, advocates that members of the computer underground should be called crackers. Yet, those people see themselves as hackers and even try to include the views of Raymond in what they see as a wider hacker culture, a view that Raymond has harshly rejected. Instead of a hacker/cracker dichotomy, they emphasize a spectrum of different categories, such as white hat, grey hat, black hat and script kiddie. In contrast to Raymond, they usually reserve the term cracker for more malicious activity.
According to Ralph D. Clifford, a cracker or cracking is to "gain unauthorized access to a computer in order to commit another crime such as destroying information contained in that system". These subgroups may also be defined by the legal status of their activities.
A white hat hacker breaks security for non-malicious reasons, either to test their own security system, perform penetration tests or vulnerability assessments for a client - or while working for a security company which makes security software. The term is generally synonymous with ethical hacker, and the EC-Council, among others, have developed certifications, courseware, classes, and online training covering the diverse arena of ethical hacking.
A "black hat" hacker is a hacker who "violates computer security for little reason beyond maliciousness or for personal gain" (Moore, 2005). The term was coined by Richard Stallman, to contrast the maliciousness of a criminal hacker versus the spirit of playfulness and exploration in hacker culture, or the ethos of the white hat hacker who performs hacking duties to identify places to repair or as a means of legitimate employment. Black hat hackers form the stereotypical, illegal hacking groups often portrayed in popular culture, and are "the epitome of all that the public fears in a computer criminal".
A grey hat hacker lies between a black hat and a white hat hacker. A grey hat hacker may surf the Internet and hack into a computer system for the sole purpose of notifying the administrator that their system has a security defect, for example. They may then offer to correct the defect for a fee. Grey hat hackers sometimes find the defect of a system and publish the facts to the world instead of a group of people. Even though grey hat hackers may not necessarily perform hacking for their personal gain, unauthorized access to a system can be considered illegal and unethical.
A social status among hackers, elite is used to describe the most skilled. Newly discovered exploits circulate among these hackers. Elite groups such as Masters of Deception conferred a kind of credibility on their members.
A script kiddie (also known as a skid or skiddie) is an unskilled hacker who breaks into computer systems by using automated tools written by others (usually by other black hat hackers), hence the term script (i.e. a prearranged plan or set of activities) kiddie (i.e. kid, child—an individual lacking knowledge and experience, immature), usually with little understanding of the underlying concept.
A blue hat hacker is someone outside computer security consulting firms who is used to bug-test a system prior to its launch, looking for exploits so they can be closed. Microsoft also uses the term BlueHat to represent a series of security briefing events.
A hacktivist is a hacker who utilizes technology to publicize a social, ideological, religious or political message.
Hacktivism can be divided into two main groups:
- Cyberterrorism — Activities involving website defacement or denial-of-service attacks; and,
- Freedom of information — Making information that is not public, or is public in non-machine-readable formats, accessible to the public.
Organized criminal gangs
Groups of hackers that carry out organized criminal activities for profit.
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|Related security categories|
A typical approach in an attack on Internet-connected system is:
- Network enumeration: Discovering information about the intended target.
- Vulnerability analysis: Identifying potential ways of attack.
- Exploitation: Attempting to compromise the system by employing the vulnerabilities found through the vulnerability analysis.
In order to do so, there are several recurring tools of the trade and techniques used by computer criminals and security experts.
A security exploit is a prepared application that takes advantage of a known weakness. Common examples of security exploits are SQL injection, cross-site scripting and cross-site request forgery which abuse security holes that may result from substandard programming practice. Other exploits would be able to be used through File Transfer Protocol (FTP), Hypertext Transfer Protocol (HTTP), PHP, SSH, Telnet and some Web pages. These are very common in Web site and Web domain hacking.
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- Vulnerability scanner
- A vulnerability scanner is a tool used to quickly check computers on a network for known weaknesses. Hackers also commonly use port scanners. These check to see which ports on a specified computer are "open" or available to access the computer, and sometimes will detect what program or service is listening on that port, and its version number. (Firewalls defend computers from intruders by limiting access to ports and machines, but they can still be circumvented.)
- Finding vulnerabilities
- Hackers may also attempt to find vulnerabilities manually. A common approach is to search for possible vulnerabilities in the code of the computer system then test them, sometimes reverse engineering the software if the code is not provided.
- Brute-force attack
- Password guessing. This method is very fast when used to check all short passwords, but for longer passwords other methods such as the dictionary attack are used, because of the time a brute-force search takes.
- Password cracking
- Password cracking is the process of recovering passwords from data that has been stored in or transmitted by a computer system. Common approaches include repeatedly trying guesses for the password, trying the most common passwords by hand, and repeatedly trying passwords from a "dictionary", or a text file with many passwords.
- Packet analyzer
- A packet analyzer ("packet sniffer") is an application that captures data packets, which can be used to capture passwords and other data in transit over the network.
- Spoofing attack (phishing)
- A spoofing attack involves one program, system or website that successfully masquerades as another by falsifying data and is thereby treated as a trusted system by a user or another program — usually to fool programs, systems or users into revealing confidential information, such as user names and passwords.
- A rootkit is a program that uses low-level, hard-to-detect methods to subvert control of an operating system from its legitimate operators. Rootkits usually obscure their installation and attempt to prevent their removal through a subversion of standard system security. They may include replacements for system binaries, making it virtually impossible for them to be detected by checking process tables.
- Social engineering
- In the second stage of the targeting process, hackers often use Social engineering tactics to get enough information to access the network. They may contact the system administrator and pose as a user who cannot get access to his or her system. This technique is portrayed in the 1995 film Hackers, when protagonist Dade "Zero Cool" Murphy calls a somewhat clueless employee in charge of security at a television network. Posing as an accountant working for the same company, Dade tricks the employee into giving him the phone number of a modem so he can gain access to the company's computer system.
- Hackers who use this technique must have cool personalities, and be familiar with their target's security practices, in order to trick the system administrator into giving them information. In some cases, a help-desk employee with limited security experience will answer the phone and be relatively easy to trick. Another approach is for the hacker to pose as an angry supervisor, and when his/her authority is questioned, threaten to fire the help-desk worker. Social engineering is very effective, because users are the most vulnerable part of an organization. No security devices or programs can keep an organization safe if an employee reveals a password to an unauthorized person.
- Social engineering can be broken down into four sub-groups:
- Intimidation As in the "angry supervisor" technique above, the hacker convinces the person who answers the phone that their job is in danger unless they help them. At this point, many people accept that the hacker is a supervisor and give them the information they seek.
- Helpfulness The opposite of intimidation, helpfulness exploits many people's natural instinct to help others solve problems. Rather than acting angry, the hacker acts distressed and concerned. The help desk is the most vulnerable to this type of social engineering, as (a.) its general purpose is to help people; and (b.) it usually has the authority to change or reset passwords, which is exactly what the hacker wants.
- Name-dropping The hacker uses names of authorized users to convince the person who answers the phone that the hacker is a legitimate user him or herself. Some of these names, such as those of webpage owners or company officers, can easily be obtained online. Hackers have also been known to obtain names by examining discarded documents (so-called "dumpster diving").
- Technical Using technology is also a way to get information. A hacker can send a fax or email to a legitimate user, seeking a response that contains vital information. The hacker may claim that he or she is involved in law enforcement and needs certain data for an investigation, or for record-keeping purposes.
- Trojan horses
- A Trojan horse is a program that seems to be doing one thing but is actually doing another. It can be used to set up a back door in a computer system, enabling the intruder to gain access later. (The name refers to the horse from the Trojan War, with the conceptually similar function of deceiving defenders into bringing an intruder into a protected area.)
- Computer virus
- A virus is a self-replicating program that spreads by inserting copies of itself into other executable code or documents. By doing this, it behaves similarly to a biological virus, which spreads by inserting itself into living cells. While some viruses are harmless or mere hoaxes, most are considered malicious.
- Computer worm
- Like a virus, a worm is also a self-replicating program. It differs from a virus in that (a.) it propagates through computer networks without user intervention; and (b.) does not need to attach itself to an existing program. Nonetheless, many people use the terms "virus" and "worm" interchangeably to describe any self-propagating program.
- Keystroke logging
- A keylogger is a tool designed to record ("log") every keystroke on an affected machine for later retrieval, usually to allow the user of this tool to gain access to confidential information typed on the affected machine. Some keyloggers use virus-, trojan-, and rootkit-like methods to conceal themselves. However, some of them are used for legitimate purposes, even to enhance computer security. For example, a business may maintain a keylogger on a computer used at a point of sale to detect evidence of employee fraud.
Tools and Procedures
- A thorough examination of hacker tools and procedures may be found in Cengage Learning's E|CSA certification workbook.
Notable intruders and criminal hackers
Notable security hackers
- Andrew Auernheimer, sentenced to 3 years in prison, is a grey hat hacker whose security group Goatse Security exposed a flaw in AT&T's iPad security.
- Dan Kaminsky is a DNS expert who exposed multiple flaws in the protocol and investigated Sony's rootkit security issues in 2005. He has spoken in front of the United States Senate on technology issues.
- Ed Cummings (also known as Bernie S) is a longstanding writer for 2600: The Hacker Quarterly. In 1995, he was arrested and charged with possession of technology that could be used for fraudulent purposes, and set legal precedents after being denied both a bail hearing and a speedy trial.
- Eric Corley (also known as Emmanuel Goldstein) is the longstanding publisher of 2600: The Hacker Quarterly. He is also the founder of the Hackers on Planet Earth (HOPE) conferences. He has been part of the hacker community since the late 1970s.
- Gary McKinnon is a Scottish hacker who was facing extradition to the United States to face criminal charges. Many people in the UK called on the authorities to be lenient with McKinnon, who suffers from Asperger syndrome. The extradition has now been dropped.
- Gordon Lyon, known by the handle Fyodor, authored the Nmap Security Scanner as well as many network security books and web sites. He is a founding member of the Honeynet Project and Vice President of Computer Professionals for Social Responsibility.
- Guccifer 2.0, who claimed that he hacked into the Democratic National Committee (DNC) computer network
- Jacob Appelbaum is an advocate, security researcher, and developer for the Tor project. He speaks internationally for usage of Tor by human rights groups and others concerned about Internet anonymity and censorship.
- Kevin Mitnick is a computer security consultant and author, formerly the most wanted computer criminal in United States history.
- Len Sassaman was a Belgian computer programmer and technologist who was also a privacy advocate.
- Meredith L. Patterson is a well-known technologist and biohacker who has presented research with Dan Kaminsky and Len Sassaman at many international security and hacker conferences.
- Michał Zalewski (lcamtuf) is a prominent security researcher.
- Rafael Núñez, a.k.a. RaFa, was a notorious hacker who was sought by the Federal Bureau of Investigation in 2001. He has since become a respected computer security consultant and an advocate of children's online safety.
- Solar Designer is the pseudonym of the founder of the Openwall Project.
The computer underground has produced its own specialized slang, such as 1337speak. Its members often advocate freedom of information, strongly opposing the principles of copyright, as well as the rights of free speech and privacy. Writing software and performing other activities to support these views is referred to as hacktivism. Some consider illegal cracking ethically justified for these goals; a common form is website defacement. The computer underground is frequently compared to the Wild West. It is common for hackers to use aliases to conceal their identities.
Hacker groups and conventions
The computer underground is supported by regular real-world gatherings called hacker conventions or "hacker cons". These events include SummerCon (Summer), DEF CON, HoHoCon (Christmas), ShmooCon (February), BlackHat, Chaos Communication Congress, AthCon, Hacker Halted, and HOPE. Local Hackfest groups organize and compete to develop their skills to send a team to a prominent convention to compete in group pentesting, exploit and forensics on a larger scale. Hacker groups became popular in the early 1980s, providing access to hacking information and resources and a place to learn from other members. Computer bulletin board systems (BBSs), such as the Utopias, provided platforms for information-sharing via dial-up modem. Hackers could also gain credibility by being affiliated with elite groups.
Consequences for malicious hacking
|65||Tampering with computer source documents – Intentional concealment, destruction or alteration of source code when the computer source code is required to be kept or maintained by law for the time being in force||Imprisonment up to three years, or/and with fine up to 20000 rupees|
|66||Hacking||Imprisonment up to three years, or/and with fine up to 50000 rupees|
- Article 138ab of Wetboek van Strafrecht prohibits computervredebreuk, which is defined as intruding an automated work or a part thereof with intention and against the law. Intrusion is defined as access by means of:
Maximum imprisonment is one year or a fine of the fourth category.
- A computer exclusively for the use of a financial institution or the United States Government, or, in the case of a computer not exclusively for such use, used by or for a financial institution or the United States Government and the conduct constituting the offense affects that use by or for the financial institution or the Government.
- A computer which is used in or affecting interstate or foreign commerce or communication, including a computer located outside the United States that is used in a manner that affects interstate or foreign commerce or communication of the United States;
The maximum imprisonment or fine for violations of the Computer Fraud and Abuse Act depends on the severity of the violation and the offender's history of violations under the Act.
Hacking and the media
The most notable hacker-oriented print publications are Phrack, Hakin9 and 2600: The Hacker Quarterly. While the information contained in hacker magazines and ezines was often outdated by the time they were published, they enhanced their contributors' reputations by documenting their successes.
Hackers in fiction
Hackers often show an interest in fictional cyberpunk and cyberculture literature and movies. The adoption of fictional pseudonyms, symbols, values and metaphors from these works is very common.
- The cyberpunk novels of William Gibson—especially the Sprawl trilogy—are very popular with hackers.
- Helba from the .hack manga and anime series
- Merlin of Amber, the protagonist of the second series in The Chronicles of Amber by Roger Zelazny, is a young immortal hacker-mage prince who has the ability to traverse shadow dimensions.
- Lisbeth Salander in The Girl with the Dragon Tattoo by Stieg Larsson
- Alice from Heaven's Memo Pad
- Ender's Game by Orson Scott Card
- Evil Genius by Catherine Jinks
- Hackers (anthology) by Jack Dann and Gardner Dozois
- Little Brother by Cory Doctorow
- Neuromancer by William Gibson
- Snow Crash by Neal Stephenson
- Eagle Eye
- Enemy of the State
- Girl With The Dragon Tattoo
- Live Free or Die Hard
- The Matrix series
- The Net
- The Net 2.0
- Pirates of Silicon Valley
- Take Down
- Tron: Legacy
- Weird Science
- The Fifth Estate
- Who Am I – No System Is Safe (film)
- The Art of Deception by Kevin Mitnick
- The Art of Intrusion by Kevin Mitnick
- The Cuckoo's Egg by Clifford Stoll
- Ghost in the Wires: My Adventures as the World's Most Wanted Hacker by Kevin Mitnick
- The Hacker Crackdown by Bruce Sterling
- The Hacker's Handbook by Hugo Cornwall (Peter Sommer)
- Hacking: The Art of Exploitation Second Edition by Jon Erickson
- Out of the Inner Circle by Bill Landreth and Howard Rheingold
- Underground by Suelette Dreyfus
- Winkler, Ira. Spies Among Us: How to Stop the Spies, Terrorists, Hackers, and Criminals You Don't Even Know You Encounter Every Day. John Wiley & Sons. 2005. pg. 92. ISBN 9780764589904.
- Sterling, Bruce (1993). "Part 2(d)". The Hacker Crackdown. McLean, Virginia: IndyPublish.com. p. 61. ISBN 1-4043-0641-2.
- Blomquist, Brian (May 29, 1999). "FBI's Web Site Socked as Hackers Target Feds". New York Post.
- "The Hacker's Dictionary". Retrieved 23 May 2013.
- Political notes from 2012: September–December. stallman.org
- Raymond, Eric S. "Jargon File: Cracker".
Coined ca. 1985 by hackers in defense against journalistic misuse of hacker
- Yagoda, Ben (6 March 2014). "A Short History of "Hack"". The New Yorker. Retrieved 2 November 2016.
- Caldwell, Tracey (22 July 2011). "Ethical hackers: putting on the white hat". Network Security. 2011 (7): 10–13. doi:10.1016/s1353-4858(11)70075-7.
- See the 1981 version of the Jargon File, entry "hacker", last meaning.
- "Computer hacking: Where did it begin and how did it grow?". WindowSecurity.com. October 16, 2002.
- Elmer-DeWitt, Philip (August 29, 1983). "The 414 Gang Strikes Again". Time. p. 75.
- Detroit Free Press. September 27, 1983. Missing or empty
- "Beware: Hackers at play". Newsweek. September 5, 1983. pp. 42–46, 48.
- "Timeline: The U.S. Government and Cybersecurity". Washington Post. 2003-05-16. Retrieved 2006-04-14.
- David Bailey, "Attacks on Computers: Congressional Hearings and Pending Legislation," sp, p. 180, 1984 IEEE Symposium on Security and Privacy, 1984.
- Clifford, D. (2011). Cybercrime: The Investigation, Prosecution and Defense of a Computer-Related Crime. Durham, North Carolina: Carolina Academic Press. ISBN 1594608539.
- Wilhelm, Douglas (2010). "2". Professional Penetration Testing. Syngress Press. p. 503. ISBN 978-1-59749-425-0.
- EC-Council. eccouncil.org
- Moore, Robert (2005). Cybercrime: Investigating High Technology Computer Crime. Matthew Bender & Company. p. 258. ISBN 1-59345-303-5.Robert Moore
- O'Brien, Marakas, James, George (2011). Management Information Systems. New York, NY: McGraw-Hill/ Irwin. pp. 536–537. ISBN 978-0-07-752217-9.
- Moore, Robert (2006). Cybercrime: Investigating High-Technology Computer Crime (1st ed.). Cincinnati, Ohio: Anderson Publishing. ISBN 978-1-59345-303-9.
- Thomas, Douglas (2002). Hacker Culture. University of Minnesota Press. ISBN 978-0-8166-3346-3.
- Andress, Mandy; Cox, Phil; Tittel, Ed (2001). CIW Security Professional. New York, NY: Wiley. p. 638. ISBN 0-7645-4822-0.
- "Blue hat hacker Definition". PC Magazine Encyclopedia. Retrieved May 31, 2010.
A security professional invited by Microsoft to find vulnerabilities in Windows.
- Fried, Ina (June 15, 2005). "Blue Hat summit meant to reveal ways of the other side". Microsoft meets the hackers. CNET News. Retrieved May 31, 2010.
- Markoff, John (October 17, 2005). "At Microsoft, Interlopers Sound Off on Security". The New York Times. Retrieved May 31, 2010.
- Chabrow, Eric (February 25, 2012). "7 Levels of Hackers: Applying An Ancient Chinese Lesson: Know Your Enemies". GovInfo Security. Retrieved February 27, 2012.
- Gupta, Ajay; Klavinsky, Thomas and Laliberte, Scott (March 15, 2002) Security Through Penetration Testing: Internet Penetration. informit.com
- Rodriguez, Chris; Martinez, Richard. "The Growing Hacking Threat to Websites: An Ongoing Commitment to Web Application Security" (PDF). Frost & Sullivan. Retrieved 13 August 2013.
- Kerner, Sean Michael. "Sentry MBA Uses Credential Stuffing To Hack Sites." Eweek (2016): 8. Academic Search Complete. Web. 7 Feb. 2017.
- Thompson, Samuel T. C. "Helping The Hacker? Library Information, Security, And Social Engineering." Information Technology & Libraries 25.4 (2006): 222-225. Academic Search Complete. Web. 7 Feb. 2017.
- Press, EC-Council (2011). Penetration Testing: Procedures & Methodologies. Clifton, NY: CENGAGE Learning. ISBN 1435483677.
- "Gary McKinnon extradition ruling due by 16 October". BBC News. September 6, 2012. Retrieved September 25, 2012.
- "Kevin Mitnick sentenced to nearly four years in prison; computer hacker ordered to pay restitution ..." (Press release). United States Attorney's Office, Central District of California. August 9, 1999. Retrieved April 10, 2010.
- Jordan, Tim; Taylor, Paul A. (2004). Hacktivism and Cyberwars. Routledge. pp. 133–134. ISBN 978-0-415-26003-9.
Wild West imagery has permeated discussions of cybercultures.
- Thomas, Douglas (2003). Hacker Culture. University of Minnesota Press. p. 90. ISBN 978-0-8166-3346-3.
- Artikel 138ab. Wetboek van Strafrecht, December 27, 2012
- Swabey, Pete (27 February 2013). "Data leaked by Anonymous appears to reveal Bank of America's hacker profiling operation". Information Age. Retrieved 21 February 2014.
- "Hackers and Viruses: Questions and Answers". Scienzagiovane. University of Bologna. 12 November 2012. Retrieved 21 February 2014.
- Staples, Brent (May 11, 2003). "A Prince of Cyberpunk Fiction Moves Into the Mainstream". The New York Times.
Mr. Gibson's novels and short stories are worshiped by hackers
- Apro, Bill; Hammond, Graeme (2005). Hackers: The Hunt for Australia's Most Infamous Computer Cracker. Rowville, Vic: Five Mile Press. ISBN 1-74124-722-5.
- Beaver, Kevin (2010). Hacking for Dummies. Hoboken, NJ: Wiley Pub. ISBN 978-0-7645-5784-2.
- Conway, Richard; Cordingley, Julian (2004). Code Hacking: A Developer's Guide to Network Security. Hingham, Mass: Charles River Media. ISBN 978-1-58450-314-9.
- Freeman, David H.; Mann, Charles C. (1997). At Large: The Strange Case of the World's Biggest Internet Invasion. New York: Simon & Schuster. ISBN 0-684-82464-7.
- Granville, Johanna (Winter 2003). "Dot.Con: The Dangers of Cyber Crime and a Call for Proactive Solutions". Australian Journal of Politics and History. 49 (1): 102–109. doi:10.1111/1467-8497.00284. Retrieved 20 February 2014.
- Gregg, Michael (2006). Certified Ethical Hacker. Indianapolis, Ind: Que Certification. ISBN 978-0-7897-3531-7.
- Hafner, Katie; Markoff, John (1991). Cyberpunk: Outlaws and Hackers on the Computer Frontier. New York: Simon & Schuster. ISBN 0-671-68322-5.
- Harper, Allen; Harris, Shon; Ness, Jonathan (2011). Gray Hat Hacking: The Ethical Hacker's Handbook (3rd ed.). New York: McGraw-Hill. ISBN 978-0-07-174255-9.
- McClure, Stuart; Scambray, Joel; Kurtz, George (1999). Hacking Exposed: Network Security Secrets and Solutions. Berkeley, Calif: Mcgraw-Hill. ISBN 0-07-212127-0.
- Russell, Ryan (2004). Stealing the Network: How to Own a Continent. Rockland, Mass: Syngress Media. ISBN 978-1-931836-05-0.
- Taylor, Paul A. (1999). Hackers: Crime in the Digital Sublime. London: Routledge. ISBN 978-0-415-18072-6.
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