1. Programmers with advanced technology.
2. Cybercriminals.
3. People who specialize in network security. (and 2 overlap, but only partially. Some criminals don't study safety. Just use tools to do evil).
But as far as I'm concerned:
The meaning of 1 doesn't seem to be very useful. Only by reading some older articles can you meet people who say this.
Meaning 2, the media likes to use it. Could it be technical? As long as you do something bad online, it's always called this in the news.
Meaning 3 because of the existence of 2, people in meaning 3 basically don't recognize this word.
And this word is out of fashion now. A little old. Security researchers have many new titles. I wonder if it will only represent 2 in the future.
I feel it myself. Many people are alienating the word hacker.
Are you a hacker?
B: You are the hacker. Your whole family are hackers.
Besides, it's not scoring the cracker. I think it just adds to my trouble. Black pages are not always written. It was hacked by XXXX. I wonder if this grammar is correct. It is said to be wrong. Anyway, they didn't get cracked by XXXX and hung up.
My own understanding is that hackers are people who have the ability to hack your computer system. )。 It's up to him whether it's black or not. Let's break down the black hat, the white hat and the green hat of the police mobile unit.