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Pc Doctor24 Computer Help - Virus Protection Vocabulary - P

Services:

Password Attacks Password Sniffing Payload
PGP Piggyback Polymorphic Virus
Program Infector    

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Check out the Virus Glossary for the latest virus terminology:

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Password Attacks

A password attack is an attempt to obtain or decrypt a legitimate user's password. Hackers can use password dictionaries, cracking programs, and password sniffers in password attacks. Defense against password attacks is rather limited but usually consists of a password policy including a minimum length, unrecognizable words, and frequent changes. See Also: Password Sniffer

Password Sniffing

The use of a sniffer to capture passwords as they cross a network. The network could be a local area network, or the Internet itself. The sniffer can be hardware or software. Most sniffers are passive and only log passwords. The attacker must then analyze the logs later. See Also: Sniffer

Payload

Refers to the effects produced by a virus attack. Sometimes refers to a virus associated with a dropper or Trojan horse.

PGP

Pretty Good Privacy. Considered the strongest program for encrypting data files and/or e-mail messages on PCs and Macintosh computers. PGP includes authentication to verify the sender of a message and non-repudiation to prevent someone denying they sent a message.

Piggyback

To gain unauthorized access to a system via an authorized user's legitimate connection.

Polymorphic Virus

Polymorphic viruses create varied (though fully functional) copies of themselves as a way to avoid detection from anti-virus software. Some polymorphic virus use different encryption schemes and requires different decryption routines. Thus, the same virus may look completely different on different systems or even within different files. Other polymorphic viruses vary instruction sequences and use false commands in the attempt to thwart anti-virus software. One of the most advanced polymorphic viruses uses a mutation-engine and random-number generators to change the virus code and its decryption routine. See Also: Mutating Virus

Program Infector

A program infector virus infects other program files once an infected application is executed and the activated virus is loaded into memory.

 

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