A computer hacker is a computer expert who uses their technical knowledge to achieve a goal or overcome an obstacle, within a computerized system by non-standard means.

1. 5 BIGGEST
CYBER
ATTACKS
And most famous hackers in the world
Roman Antonov 20 JAN 2021

2. No System Is Absolutely Safe
Any system can be hacked, even if it is banks or government
information system. Doesn't exist absolutely secure systems,
but have various of protections on different levels, which
interrupt hackers attacks.
No Users is Absolutely anonymous
Sooner or later, attackers will be catched by their traces.
Hacker skills can postpone this event, but not absolutely
avoid.
Facts that you must know

3. Security hacker
Though the term "hacker" has become associated in
popular culture with a "security hacker" – someone
who utilizes their technical know-how of bugs or
exploits to break into computer systems and access
data which would otherwise be unavailable to them
– hacking can also be utilized by legitimate figures in
legal situations.
Hacker
A computer hacker is a computer expert who uses
their technical knowledge to achieve a goal or
overcome an obstacle, within a computerized
system by non-standard means.

4. MONEY IS NOT ALWAYS MAIN
HACKERS MOTIVATION
First, there is a criminal financial gain to be had when hacking systems with the
specific purpose of stealing credit card numbers or manipulating banking systems.
Second, many hackers increasing their reputation within the hacker subculture.
Third, information on products or services that can be stolen or used as leverage
within the marketplace.
And fourth, state-sponsored attacks provide nation states within political games.

5. WORLD MOST FAMOUS HACKERS
Kevin Mitnick
World's most famous hacker, global bestselling author, and
the top cybersecurity keynote speaker
Jonathan James
James hacked NASA's network and downloaded enough source
code (assets equaling $1.7 million at the time) to learn how the
International Space Station worked.

6. Anonymous
Anonymous got its start in 2003 on 4chan message boards in an
unnamed forum. The group exhibits little organization and is loosely
focused on the concept of social justice.
WORLD MOST FAMOUS HACKERS
Albert Gonzalez
American computer hacker and computer criminal who is
accused of masterminding the combined credit card theft and
subsequent reselling of more than 170 million card and ATM
numbers from 2005 to 2007: the biggest such fraud in history.

7. TOP 5 CYBER ATTACKS
"Teen hacks NASA and US Defense Department"
"Morris Worm"
"Twitter hack: 130 accounts targeted in attack"
"MafiaBoy causes $1 billion dollars"
"The South Korean nightmare"

8. #1 Morris Worm
The Morris Worm was a self-replicating
computer program (worm) written by Robert
Tappan Morris, a student at Cornell University,
and released from MIT on November 2, 1988
Before spreading to a new machine, the Morris Worm
checked if the machine had already been infected and
was running a Morris Worm process. If a target machine
had already been infected, the Morris Worm would re-
infect it 1 in 7 times.
Morris receiving a sentence of three years in prison, 400
hours of community service and a $10,000 fine.

9. #2 Teen hacks NASA and
US Defense Department
Jonathan James was 15 at the time but what he did that
year secured him a place in the hacker’s hall of fame.
James had managed to penetrate the computers of a US Department of
Defense divison and installed a ‘backdoor’ on its servers.
This allowed him to intercept thousands of emails from government
organisations including ones containing usernames and passwords for
military computers. James steal a piece of NASA software which cost the
space agency $41,000 as systems were shutdown for three weeks.
He committed suicide in 2008 after he was accused of conspiring with
other hackers to steal credit card information

10. On 15 July, a number of Bitcoin-related accounts began
tweeting what appeared to be a simple Bitcoin scam,
promising to "give back" to the community by doubling
any Bitcoin sent to their address.
The security breach saw accounts including those of
Barack Obama, Elon Musk, Kanye West and Bill Gates
tweet a Bitcoin scam to millions of followers.
Despite the fact that the scam was obvious to some, the
attackers received hundreds of transfers, worth more
than $100,000 (£80,000).
#3 Twitter hack

11. Another 15 year old that caused mischief in
cyber space was Michael Calce a.k.a. MafiaBoy.
In 2000, Calce, was just a Canadian high school
student when decided to unleash a DDoS attack
on a number of high-profile commercial
websites including Amazon, CNN, eBay and
Yahoo!.An industry expert estimated the attacks
resulted in a $US1.2 billion dollar damage bill.
#4 MafiaBoy causes
$1 billion dollars

12. The South Koreans learned in January 2014 that data
from 100 million credit cards had been stolen over the
course of several years. In addition, 20 million bank
accounts had also been hacked.
Hacker stole personal information from customers of
credit card companies when he worked for them as a
consultant by simply copying the data to an external
hard drive. He then resold the data to credit traders
and telemarketing companies.
#5 The South Korean
nightmare

13. BE SAFE :)
Roman Antonov Wisdom of Living