He also invaded the North American Defense Command (NORAD), an achievement believed to have inspired the 1983 war game movie. He subsequently invaded the Digital Equipment Corporation (DEC) network and copied their software. At the time, DEC was the leading computer manufacturer, and Mitnick's intrusion capabilities put it at risk. He was eventually arrested, convicted and sent to prison.

You might think he would stop, but when he was free, he broke into Pacific Bell's voice mail system. It is believed that the reason he completely controlled the Pacific Bell network was simply because he proved that it can be done. After the Pacific Bell incident, he was issued an arrest warrant, but he escaped and hid for more than two years, but was arrested and jailed again.

2.The other is anonymous, and he allegedly started on 4chan's news forum

It is believed that anonymous people pay little attention to the concept of social justice. For example, the group clashed with the Church of Scientology and started hacking its website.

This have a negative impact on their search engine rankings on Google. They did not stop there, they continued to destroy his fax machine with all black images. Although the FBI and other law enforcement agencies found the team to work more efficiently, the lack of a true hierarchy within the team made it almost impossible to identify or delete the entire anonymous group.

3.The third place is Albert Gonzalez , In fact Gonzalez was arrested in New York in a payment card fraud case involving the theft of data from millions of accounts.

In order to avoid imprisonment, he became an informant for the Secret Service and eventually helped to prosecute dozens of Shadow Crew members. He is considered one of the best hackers and moderators.

However, when working with them, Gonzalez continued his criminal activities. He stole more than 180 million debit card accounts from companies including OfficeMax, Dave and Busters, and Boston Market, as well as some associates. During the sentencing period, federal prosecutors had to mention that Gonzalez’s human victims were “unparalleled”.

4.The fourth place is Astra, whose full identity has never been revealed. The word ASTRA is a weapon in Sanskrit. It is said that he has invaded the Dassault Group for nearly five years. Therefore, he stole advanced software and weapon technology data, which has been sold to 250 people worldwide.

His move cost Dassault Group 360 million US dollars. Some time ago, a 58-year-old Greek mathematician believed to be Astra was arrested. However, his real name never came out.

All of these people have a history of hacking into the safest website in the world, and those who are still valid are anonymous.