U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

A  |  B  |  C  |  D  |  E  |  F  |  G  |  H  |  I  |  J  |  K  |  L  |  M  |  N  |  O  |  P  |  Q  |  R  |  S  |  T  |  U  |  V  |  W  |  X  |  Y  |  Z

web bug

Definition(s):

  Malicious code, invisible to a user, placed on web sites in such a way that it allows third parties to track use of web servers and collect information about the user, including internet protocol (IP) address, host name, browser type and version, operating system name and version, and web browser cookie.
Source(s):
CNSSI 4009-2015

  A tiny image, invisible to a user, placed on Web pages in such a way to enable third parties to track use of Web servers and collect information about the user, including IP address, host name, browser type and version, operating system name and version, and cookies.
Source(s):
NIST SP 800-28 Version 2 under Web Bug