White Hat Hacker: Uncovering Cybersecurity Threats & Protecting Data with Ethical Hacking
A white hat hacker is an ethical hacker who works to find security vulnerabilities in systems and networks in order to prevent malicious attacks.
They are often employed by companies to ensure the security of their systems and networks, and they play a critical role in helping organizations protect their data, networks, and applications.
White hat hackers use the same skills as malicious hackers, but they use them to identify and fix security flaws, instead of exploiting them for malicious purposes.
1. Kevin Mitnick
Kevin Mitnick is an American computer security consultant, author, and hacker. He is best known for his high-profile 1995 arrest and five years in prison for various computer and communications-related crimes. Mitnick's pursuit, arrest, and trial along with the associated journalism, books, and films, made him one of the most famous hackers of all time.
Mitnick first gained notoriety in 1988, when he was arrested and charged with breaking into the Digital Equipment Corporation's computer network. He was convicted and sentenced to 12 months in prison. After his release, Mitnick continued to hack into various computer systems, including those of the Motorola Corporation, Sun Microsystems, and Nokia. He was arrested again in 1995 and sentenced to 46 months in prison.
Since his release from prison in 2000, Mitnick has become a successful computer security consultant and public speaker. He has written several books on computer security and has been featured in numerous documentaries and films.
2. Gary McKinnon
Gary McKinnon is a Scottish hacker who gained notoriety in 2002 for breaking into 97 United States military and NASA computers over a 13-month period. He was accused of deleting critical files from operating systems, which shut down the US Army's Military District of Washington network of 2,000 computers for 24 hours.
McKinnon was arrested in 2002 and extradited to the United States in 2005. He was charged with seven counts of computer-related crimes, including unauthorized access to protected computers and causing damage to them. He was facing up to 70 years in prison and a $2 million fine.
McKinnon's extradition was blocked by the British government in 2012, citing the risk of suicide if he were to be extradited. He was granted a reprieve in 2015 and has since been living in the UK.
3. Adrian Lamo
Adrian Lamo is an American hacker who gained notoriety in 2003 for breaking into the computer networks of The New York Times, Microsoft, Yahoo!, and other major corporations. He was arrested in 2003 and pleaded guilty to two counts of computer crimes.
Lamo was sentenced to six months of home detention and two years of probation. He was also ordered to pay $65,000 in restitution to the companies he had hacked.
Since his release, Lamo has become a security consultant and public speaker. He has written several books on computer security and has been featured in numerous documentaries and films.
4. Jonathan James
Jonathan James was an American hacker who gained notoriety in 1999 for breaking into the computer networks of the Defense Threat Reduction Agency and NASA. He was the first juvenile to be convicted of a cybercrime in the United States.
James was arrested in 2000 and pleaded guilty to two counts of computer-related crimes. He was sentenced to six months of house arrest and four years of probation.
James committed suicide in 2008, at the age of 25. His death was attributed to depression caused by his conviction and the subsequent media attention.
5. Albert Gonzalez
Albert Gonzalez is an American hacker who gained notoriety in 2008 for breaking into the computer networks of TJX Companies, Heartland Payment Systems, and other major corporations. He was arrested in 2008 and pleaded guilty to 19 counts of computer-related crimes.
Gonzalez was sentenced to 20 years in prison and ordered to pay $25 million in restitution to the companies he had hacked. He is currently serving his sentence at the Federal Correctional Institution in Fort Dix, New Jersey.
6. Robert Tappan Morris
Robert Tappan Morris is an American computer scientist and hacker who gained notoriety in 1988 for creating the first computer worm. The worm, known as the Morris Worm, spread rapidly across the Internet and caused significant damage to computer systems.
Morris was arrested in 1988 and pleaded guilty to one count of computer-related crimes. He was sentenced to three years of probation and 400 hours of community service.
Morris is currently a professor of computer science at the Massachusetts Institute of Technology.
7. Kevin Poulsen
Kevin Poulsen is an American hacker who gained notoriety in the early 1990s for breaking into the computer networks of the Los Angeles Times, Pacific Bell, and other major corporations. He was arrested in 1991 and pleaded guilty to 15 counts of computer-related crimes.
Poulsen was sentenced to five years in prison and ordered to pay $56,000 in restitution to the companies he had hacked. He was released from prison in 1995 and has since become a successful journalist and author.
8. Vladimir Levin
Vladimir Levin is a Russian hacker who gained notoriety in 1995 for breaking into the computer networks of Citibank and other major corporations. He was arrested in 1995 and pleaded guilty to one count of computer-related crimes.
Levin was sentenced to three years in prison and ordered to pay $240,000 in restitution to the companies he had hacked. He was released from prison in 1998 and has since become a successful computer security consultant.
9. Christopher Tarnovsky
Christopher Tarnovsky is an American hacker who gained notoriety in 2006 for breaking into the computer networks of the Federal Reserve Bank of New York and other major corporations. He was arrested in 2006 and pleaded guilty to one count of computer-related crimes.
Tarnovsky was sentenced to three years of probation and ordered to pay $50,000 in restitution to the companies he had hacked. He is currently a security consultant and public speaker.
10. Jeanson James Ancheta
Jeanson James Ancheta is an American hacker who gained notoriety in 2005 for breaking into the computer networks of the US Department of Defense and other major corporations. He was arrested in 2005 and pleaded guilty to four counts of computer-related crimes.
Ancheta was sentenced to 57 months in prison and ordered to pay $15.4 million in restitution to the companies he had hacked. He was released from prison in 2009 and has since become a successful computer security consultant.

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