1.4 - Network Security

• Malware is a type of software that is designed to cause damage to a computer system or to steal private information.
• Virus malwares are computer viruses which infect computers by replicating their code in other programs and harm the computer by deleting files, corrupting files and modifying files.
• Worm malwares replicate itself in order to spread to other computers. They don't cause damage to the attacked computers but they slow down networks and computers.
• Malware trojan horses are cracked files which is similar to what the user wants, they have negative program code which can damage computers, take control and provide access to the computers.
• Ransomware malware holds a computer hostage by locking or encrypting access. Access can only be restored when a ransom is paid to the attacker.
• Unpatched software is if a software updates and security updates are not installed then the software will be vulnerable.
• Out of date anti malware is a software such as an antivirus software which isn't regularly updated then it won't be able to detect the latest viruses.
• Social engineering is the ability to obtain confidential information by asking people for it.
• Shoulder surfing is the ability to obtain information or password by observing someone typing.
• Phishing is a type of social engineering technique that involves sending emails that appear to be from a trusted source.
• Denial of Service is a hacker which will send request to a server to overload it.
• Man in the middle attack allows and attacker to intercept communications between the user and server.
• Bruce force attack is when a hacker will try every combination of password until the correct password is found.
• A SQL injection is a database query language will take advantage of web input forms to access or destroy data.