The meaning of cyber noun hacker, red Guest, Blue Guest, flying guest

A hacker (hacker) is a person who likes to use intelligence to challenge mental limits in creative ways, especially in areas where they are interested, such as computer programming or electrical engineering.

Hackers first originated in English hacker, early in the United States, the computer industry is a positive. But in media reports, the word hacker often refers to those "software hackers" (software cracker).

The word hacker, originally refers to is enthusiastic in the computer technology, the level superb computer expert, especially the program design personnel.

But today, the word hacker has been used to refer to people who use computers for sabotage or mischief. The correct English name for these people is cracker, and some people translate them into "hackers".

The fundamental difference between hackers and crackers is that hackers build, and hackers break them.

The word hacker generally has the following four kinds of meanings:

A person who has enough knowledge of a programming language (in a field) to create useful software without thinking for a long time.

A malicious (generally illegal) person who tries to crack or destroy a program, system, and network security. This meaning is often a serious problem for those who qualify (1), and they suggest that the media call this group "hacker" (cracker). Sometimes this group of people is also called "Black Hat Hacker".

A system security vulnerability that attempts to crack a system or network to alert the owner of the system. This group of people are often referred to as "white-hat hackers" or "anonymous" (sneaker) or red guests. Many of these people are employees of a computer security company and are attacking a system in a completely legal situation.

A person who, through knowledge or guesswork, makes (often good) changes to a program and alters (or enhances) the purpose of the program.

"Script Child" refers to those who have no or only a little bit of hacker skills, but just follow instructions or run some kind of hacker program to achieve the goal of cracking

"Famous hacker"

Richard stallman--, a traditional hacker, Stallman was hired in 1971 to become a programmer at MIT's Artificial Intelligence Laboratory.

Ken Thompson and the Computer Science Operations Group programmer at Dennis ritchie--Bell Labs. The two men invented the Unix operating system in 1969.

John Draper (known as Captain Clicks, Captain Crunch)-invented a plastic whistle to make free calls

Mark Abene, known as Phiber Optik, has inspired countless teenagers across America to "learn" how the American internal telephone system works.

Robert morris--, a graduate of Cornell University, accidentally spread the first Internet worm in 1988 years.

Kevin mitnick--The first hacker to be listed on the FBI's wanted list.

Kevin Poulsen--poulsen successfully controlled all telephone lines entering the Los Angeles KIIS-FM radio station in 1990 and won an award-winning audience game hosted by the station.

Vladimir levin--, the mathematician, led the Russian hacker organization to defraud Citibank of distributing 10 million of dollars.

Steve wozniak--is one of the founders of Apple's computer.

Tsotumu shimomura--The bank account of the most famous hacker Steve Wozniak in 1994.

Linus torvalds--He developed the famous Linux kernel in 1991 when he was a computer student at the University of Helsinki in Finland.