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Glossary M
Media Access Control

Media Access Control

Message Authentication Code. See the following for more information: NIST SP 800-108. NIST SP 800-185. NIST SP 800-56C.  An access control policy that is uniformly enforced across all subjects and ...

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Mail Server

Mail Server

A host that provides “electronic post office” facilities. It stores incoming mail for distribution to users and forwards outgoing mail. The term may refer to ...

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Malware

Malware

Hardware, firmware, or software that is intentionally included or inserted in a system for a harmful purpose. See IETF RFC 4949 Ver 2 for more information.  A program that ...

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Masquerading

Masquerading

A type of threat action whereby an unauthorized entity gains access to a system or performs a malicious act by illegitimately posing as an authorized ...

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Maximum Tolerable Downtime

Maximum Tolerable Downtime

The amount of time mission/business process can be disrupted without causing significant harm to the organization’s mission. See NIST SP 800-34 Rev. 1 for more information. 

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MITM Attack

MITM Attack

Man in the Middle.An attack using active interception or eavesdropping. It uses a third computer to capture traffic sent between two other systems. See POODLE ...

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