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A security hacker or security researcher is someone who explores methods for breaching defenses and exploiting weaknesses in a computer system or network. [1] Hackers may be motivated by a multitude of reasons, such as profit, protest, information gathering, [2] challenge, recreation, [3] or evaluation of a system weaknesses to assist in formulating defenses against potential hackers.
An example of a physical security measure: a metal lock on the back of a personal computer to prevent hardware tampering. Computer security (also cybersecurity, digital security, or information technology (IT) security) is the protection of computer software, systems and networks from threats that can lead to unauthorized information disclosure, theft or damage to hardware, software, or data ...
A cyberattack can be defined as any attempt by an individual or organization "using one or more computers and computer systems to steal, expose, change, disable or eliminate information, or to breach computer information systems, computer networks, and computer infrastructures". [1]
A hacker is a person skilled in information technology who achieves goals by non-standard means. The term has become associated in popular culture with a security hacker – someone with knowledge of bugs or exploits to break into computer systems and access data which would otherwise be inaccessible to them.
Phishing is a form of social engineering and a scam where attackers deceive people into revealing sensitive information [1] or installing malware such as viruses, worms, adware, or ransomware.
There are a number of tools intended specifically to decrypt files locked by ransomware, although successful recovery may not be possible. [2] [154] If the same encryption key is used for all files, decryption tools use files for which there are both uncorrupted backups and encrypted copies (a known-plaintext attack in the jargon of cryptanalysis.
1] Google hacking, also named Google dorking, [2] [3] is a hacker technique that uses Google Search and other Google applications to find security holes in the configuration and computer code that websites are using.
In cryptanalysis and computer security, password cracking is the process of guessing passwords [1] protecting a computer system.A common approach (brute-force attack) is to repeatedly try guesses for the password and to check them against an available cryptographic hash of the password. [2]