Is a technique used to gain unauthorized access to computers, wherein the attacker assumes or simulates an address that indicate to the victim that the messages are coming from the address of a trusted host.

Spoofing

Explanation:

Spoofing is generally a deceptive or malicious technique where communication is sent  from an unidentified source masked as the recipient's recognized source.  

It is most common in systems of communication lacking a high level of safety.

It may extend to messages, phone calls, and websites, or could  complex,  including an IP address spoofing device.

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