Definitions for backdoor
This page provides all possible meanings and translations of the word backdoor
Random House Webster's College Dictionary
a secret, furtive, illicit, or indirect method or means.
Origin of back door:
An unprotected passageway by which a criminal can gain access to (an assumed to be) secure area.
Origin: From the phrase back door.
acting from behind and in concealment; as, backdoor intrigues
A backdoor in a computer system is a method of bypassing normal authentication, securing illegal 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 or may subvert the system through a rootkit.
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