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Security Glossary

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Term Definition
A computer program file capable of attaching to disks or other files and replicating itself repeatedly, typically without user knowledge or permission. Some viruses attach to files so when the infected file executes, the virus also executes. Other viruses sit in a computer's memory and infect files as the computer opens, modifies, or creates the files. Some viruses display symptoms, and others damage files and computer systems, but neither is essential in the definition of a virus.
The criminal practice of posing as a legitimate source to obtain information over the telephone system (phishing via phone/ voicemail). It is facilitated by Voice over IP because it can spoof (fake) caller ID to gain access to personal and financial information.
Voice over Internet protocol (VoIP)
Telephone service that uses the Internet as a global telephone network. Skype is an example of a VoIP offering for both regular and mobile phones.
An exploitable defect in a software application or operating system that allows hackers to crash systems, access information on systems, or use systems for their own purposes.