Backdoor

In cyber security a back door is a persistent method, that is permanent, for access that bypasses the normal requirements for authentication to a system, machine or device. In bypassing normal authentication requirements it may also go undetected unless monitoring picks the use up and alerts to the unexpected activity are analysed and responded to.

Examples can include a default or ‘hard coded’ password. That is, a password known to everyone or one that can’t be changed. A back door could also be placed as a change to the software that allows access through an exploitable vulnerability.

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