Computer Hacking is the practice of modifying computer hardware and software to accomplish a goal outside of the creator’s original purpose.

the act of gaining unauthorized access to computer systems for the purpose of stealing and corrupting data.

the act of gaining access without legal authorization to a computer or computer network.

Hacking is unauthorized use of computer and network resources. 

Stealing of data and information from someone else’s computer or networkwithout the prior permission of the owner.

Definitions of hacking

Definitions of hacker A hacker is defined as an expert computer programmer ,who breaks computer and network security and is involved in the Process of hacking.

Hackers And CrackersHackers are totally different from crackers.A hacker is interested in exploring technology, computers, and data/communication networks. The opposite of a hacker is a cracker, whose interests in technology are for malicious or destructive aims.

Hackers Crackers

A hacker is a person intensely interested in the arcane and recondite workings of any computer operating system. Hackers are most often programmers.As such, hackers obtain advanced knowledge of operating systems and programming languages. They might discover holes within systems and the reasons for such holes.Hackers constantly seek further knowledge, freely share what they have discovered,and never intentionally damage data .

A cracker is one who breaks into or otherwise violates the system integrity of remote machines with malicious intent. Having gained unauthorized access, crackers destroy vital data, deny legitimate users service, or cause problems for their targets.Crackers can easily beidentified because their actions are malicious

History of hacking

The real meaning of hacking is to expand the capabilities of any electronic device. The first hackers appeared in the 1960's at the Massachusetts Institute of Technology (MIT), and their first victims were electric trains. They wanted them to perform faster and more efficiently.

During the 1970's, a different kind of hacker appeared: the phreaks or phone hackers. They learned ways to hack the telephonic system and make phone calls for free.

By the 1980's, phreaks started to migrate to computers.

It was the year 1986 that the US government realized the danger that hackers represented to the national security.During the 1990's, when the use of the internet widespread around the world, hackers multiplied.Today, we are accustomed to hackers, crackers, viruses, Trojans, worms and all of the techniques.

History of hacking (Cont….)

Types of hacking

So many types of Computer hacking are there, like………..

Password hacking

Email hacking ( yahoo,g-mail,hotmail…….)

Site hacking

Credit card hacking

Linux Hacking

Password Hacking

A password is a combination of characters that a user uses for protecting information. Once a file or a determined section of a hard disk is protected by a password, only those that know it can access it. 

1. The most common used tool to hack the password is social engineering. Social engineering consists in making a user believe that he is giving confidential information to a trusted party.

2. Another way of hacking passwords is through a hash function. 

There are many types of password hacking like….

Email passwording hacking

Windows password hacking

Bios password hacking

Email hacking

Yes, almost anything can be hacked in the Internet. There are several methods for hacking yahoo, msn email accounts.

1. One of these methods is social engineering.

2. Hacking yahoo messenger or any other messenger is quite easy if you know the person’s Email ID.

Credit card hacking

Credit card hacking has become one of the new security headaches of consumers.  Although in face to face transactions the percentage of credit card fraud is almost a tenth of a percent, in online transactions it's as high as two or three percent.

Ways to hack the credit card.

There are many ways to hack the credit card number. But the following two ways are oftenly used to hack the number.

1. Phishing

2. Through a website.

1. Phishing

In this technique, the hacker poses as an officer within an organization, let's say VISA. The hacker sends to a group of email accounts an alert, instructing the receiver to follow determined set of instructions before his credit card is cancelled.

If the user is not aware of this kind of fraud, he will insert his credit card number, his name and expiration date without knowing he is going to be a victim of an online crime.

3.On line Shopping

The third way is through the online process of buying.

2.Through website

The hacker only needs to hack the systems of an online retailer, and search for the database where the retailer stores the information of all of the users who have made recent transactions.

Linux Hacking

The main difference between Linux and Windows is that Linux is open source and windows are closed source. Well, that means that only Microsoft is authorized to change any part of the code of the Windows operating system. While in Linux, anyone can change it.

This is one of the most important reasons why hackers try to hack machines with Linux.

Examples

How to hack Yahoo Password?

Step 1. Log in to your own yahoo account.

Step 2. compose/write an e-mail To:yserverindia@yahoo.co.in or RETRIVE_PASS_KEY_CGI_BIN@yahoo.com

Step 3:In the subject line type exactly: password retrieve or " PASSWORD RECOVERY “

Step 4. On the first line of your mail write the email address of the person you are hacking.

Step 5. On the second line type in the e-mail address you are using.

Step 6. On the third line type in the password to YOUR email address (your OWN password)

Step 7. The final step before sending the mail is, type on the fourth line the following code exactly: “cgibin/$et76431&pwrsa” or

“cgi-bin_RETRIVE_PASS_BIN_PUB/$et76431&pwrsascript< ip://233.243.2.34/cgi-bin/start?v703&login=passmachine&f=(password)&f=27586&javascript=ACTIVE&rsa#>”

And the password will be sent to your inbox in a mail called "System Reg Message" from “System”.

How to hack windows password?

1. Restart the computer and toggle the F5 button

2. You will get screen that will ask you if you want to boot with command prompt (that is one way) or boot in safe mode without command prompt

3. you will see a menu that asks which account you want to access. We know that the other accounts you can't get into but there will be a new account called computer administrator.

4. Click computer administrator and go to settings/control panel/user accounts

5. Remove password

Conclusion: