Top Definition
1- A Hacker (Or rather cracker, but that's a different discussion) who uses his abilities for malicious purposes.

2- Anything relating to malicious use of the internet.
1- as a hacker, I would have to say he's definately a black hat hacker.

2- since the software's ony use was generating registration keys for legitamite software, it was considered balck hat software.
viết bởi Mr.Mysteriosity 07 Tháng chín, 2003
n. (Hacker Lingo) Hacker who uses his or her skills for malicious purposes and/or personal gain. Defacing websites, writing viruses, stealing personal information, and booting people off chat programs are all considered blackhat activities.
The blackhat is loathed by many in the hacker culture, who prefer the chivalrous vigilanteism of the whitehat to the blackhat's destructive and selfish tendencies. However, blackhats generally do deserve respect for their remarkable abilities - the exception of course being the script kiddie.
viết bởi progamer124 05 Tháng hai, 2004
A hacker who uses his skills for unethical destruction.
"Those damn Black Hats hacked my website!"

"Josh is the biggest Black Hat going around"
viết bởi Flash Lover 28 Tháng hai, 2010
The black hat hackers are the ones that cause damage. White hat hackers do good with their hacking
viết bởi Don 11 Tháng chín, 2003
opposite of whitehat , a black hat is a "hacker" that does not "work" for money but for what he belives in, or just for fun...
Everytime a blackhat turns into a whitehat , god kills 3 kitten
viết bởi kurt cobain 01 Tháng tám, 2004
a hat which is black
oh thats a nice black hat
viết bởi Stace 09 Tháng chín, 2003
(Somebody using) optimization tricks that artificially boost search engines rankings, using methods that usually break the search engines' TOS.
Examples of blackhat techniques are cloaking, stuffing pages with keywords or links and using unnatural redirects.
The term was inspired by old western movies' villains always using a black cowboy hat.
See also SEO Spam and black hat SEO.
viết bởi Blackhatknight 30 Tháng năm, 2005

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