from Wikipedia:
A backdoor in a computer system (or cryptosystem or algorithm) is a method of
bypassing normal authentication, securing remote access to a computer, obtaining access
to plaintext, and so on, while attempting to remain undetected. The backdoor may take
the form of an installed program (e.g., Back Orifice), or could be a modification to an
existing program or hardware device.
According to an article on PC World: "The software vendor is giving law enforcers
access to a special tool that keeps tabs on botnets, using data compiled from the 450
million computer users who have installed the Malicious Software Removal tool that
delete permissions. They might not scan the file contents due to missing
read permission, not delete it due to missing Delete permission or not
desinfect it due to missing Write Data permission or not move to quarantine.
For test Windows XP Professional SP3 (running in a virtual machine
provided by Virtualbox v4.1.4) and the Back Orifice 2000 server file
(bo2k.exe) ( http://www.bo2k.com/ ) as a test file were used (with file
permissions set to only allow execution).
ESET NOD32
> method of
> bypassing normal authentication, securing remote access to a computer,
> obtaining access
> to plaintext, and so on, while attempting to remain undetected. The
> backdoor may take
> the form of an installed program (e.g., Back Orifice), or could be a
> modification to an
> existing program or hardware device.
>
> According to an article on PC World: "The software vendor is giving law
> enforcers
