Acronym for Man-in-the-Middle—intercepting communications between two parties.
MitM stands for Man-in-the-Middle attack. See 'Man-in-the-Middle Attack' for the full definition. Some security professionals now use 'Adversary-in-the-Middle' (AitM) or 'Machine-in-the-Middle' as gender-neutral alternatives.
Why It Matters
The DSC Perspective:
Understanding MitM explains the importance of encryption, HTTPS, and VPNs. When users ask why they can't use public Wi-Fi freely, MitM risk is the answer.