A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

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T

U

V

W

X

Y

Z

Index for glossary Z

Zero-day Attack

An attack exploiting a newly discovered vulnerability appears before the release of the corresponding patch by the software vendor.

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Zombie Computer (or Zombie)

A computer attached to the Internet that has been compromised by intruder with computer viruses or Trojan Horses and manipulated without the knowledge of the computer owner. The computer is usually used to perform malicious attacks such as denial of service attack under remote control.