encryption

hashing

access control

redundancy

exists when data can be written beyond the limits of a memory area

forces programs to behave in an unintended way

protects sensitive data through authentication, authorization and encryption

exists when processes are improperly ordered or timed

track and spy on the user

delivers advertisements, usually comes with spyware

holds a computer system or the data captive until a payment is made

persuade the user to take a specific action based on fear

modifies the operating system to create a backdoor

is a malicious executable code that is attached to other executable files

replicate themselves by independently exploiting vulnerabilities in networks

carries out malicious operations under the guise of a desired operation

increase in CPU usage

computer freezes or crashes often

unknown processes running

increase in web browsing speed

gain access to a secure location by quickly following an authorized person

use a mobile phone's texting feature to gain access into a computer system

request personal information from a party in exchange for something

gain access to privileged data by calling an individual and lying to them