Glossary of Terms

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M

M

MAC

MAC (Media Access Control)

Macdink

Machine Cryptosystem

Machine Instruction

Machine Language

Machine Learning

Machine-Oriented Language

Machine-Readable Medium

Macro

Macros

Magic

Magnetic Core Storage

Magnetic Disk Unit

Magnetic Drum Unit

Magnetic Field Intensity

Magnetic Flux Density

Magnetic Remanence

Magnetic Saturation

Magnetic stripe card

Mail server antivirus program

Mailbox

Maintainability

Maintenance Hook

Maintenance Key

Maintenance Of Configuration Documentation

Maintenance Procedures, Contract Employee

Maintenance Procedures, Local Employee

MAJCOM

MAJCOM C4 Systems Security Office

MAJCOM Computer System Security Manager

MAJCOM Computer System Security Manager (MCSSM)

Major incidents

Major Information System

Malicious links

Malicious Logic

Malicious payload

Malicious software (Malware)

Malware (malicious software)

MAN

MAN (Metropolitan Area Network)

Managed security service provider (MSSP)

Management Control Process

Management Information System

Management Of The Security Function

Manchester Encoding

Mandatory Access

Mandatory Access Control

Mandatory Access Control (MAC)

Mandatory Access Controls

Mandatory default algorithms

Mandatory Modification

Mandatory Protection

Mandatory vacations

Manged

Mangle

Mangler

Mango

Man-in-the-middle attack

Manipulation Detection

Manipulative Communications Deception

Manual Cryptosystem

Manual Remote Rekeying

MAPLESS

Marbles

Mark

Marking

Marking Of Media

Marking Of Sensitive Information

Mars

Martian

MASINT

Mask

Massage

Master Crypto-Ignition Key

Matching Programs

Material Symbol

Matrix

MATSYM

Maximum Access Time

Maximum Maytag Mode

Mbogo, Dr. Fred

MBSA

MCCB

MCCR

MCSSM

MCTL

MD5

MDC

Measure Of Effectiveness

Measurement And Signature Intelligence

Media

Media Access Control (MAC)

Media Convergence

Medium

Medium Access Control Sublayer

Meeces

MEECN

Meg

Mega

MEGO

Meltdown, Network

Meme

Memory

Memory (Non-Volatile)

Memory (Random)

Memory (Sequential)

Memory (Volatile)

Memory Address Translation Unit

Memory Bounds Checking

Memory Page Cache

Menu

MEP

MER

Message

Message Alignment Indicator

Message Authentication

Message Authentication Code

Message Authentication Codes

Message Broadcast

Message Distribution Center

Message Externals

Message Handling Systems

Message Indicator

Message integrity

Message Register Leads

Metal Particle Tape

Metamorphic viruses

Metasyntactic Variable

Method

Metric

Metrics

Metropolitan Area Network (MAN)

Metropolitan Area Network MAN

MFTL

Mgt

MHS

MHz

MI

MIB

Mickey

Mickey Mouse Program

Micro

Microinstruction

Microsoft Baseline Security Analyzer (MBSA)

Microsoft Challenge-Handshake Authentication Protocol (MS-CHAP)

Microsoft Management Console (MMC)

Microsoft Point-to-Point Encryption (MPPE)

Microwave/Wireless Communications Security

MIJI

Militarily Critical Technology

MIL-STD

Minimal Protection

Minimizing security burdens

Minor Change To A System Of Records

Minor incidents

MINTERM

MIPR

MIPS

Misbug

Missile Address

Mission-Critical

Mission-Essential Unclassified Information

Miswart

MLS

MMC (Microsoft Management Console)

MOA

Mobile COMSEC Facility

Mobile Workstation Security

Moby

Mod

Mode

Mode Of Operation

Modem

Modes Of Operation

Modulo

MOE

Mongolian Hordes Technique

Monitor

Monitoring (e. g. , Data, Line)

Monkey, Scratch

Monographic Processing

Monty

Moof

MOP

Moria

MOU

Mouse

Mouse Droppings

Mouso

MPPE (Microsoft Point-to-Point Encryption)

MRK

MRT

MS-DOS

MSE

MTBF

MTR

MTT

Mu

MUD

Muddie

Mudhead

Multichannel Information

Multics

Multilevel Device

Multilevel Mode

Multilevel Mode Or Multilevel Security Mode

Multilevel Processing

Multilevel Secure

Multilevel Security

Multilevel Security Mode

Multilevel Systems

Multiple Access

Multiple Access Rights Terminal

Multiprocessing

Multiprogramming

Multi-pronged attacks

Multi-Satellite Link

Multi-User Hosts

Multiuser Mode Of Operation

Multi-User Mode Of Operation

Multi-User Security Mode

Multi-User Security Mode Of Operation

Munch

Munching Squares

Mundane

Mung

Munge

Music

Mutter

Mutual Suspicion

Mutual Synchronization

Mutually Suspicious

Mutually Synchronized Network

MUX

Mw

Multilevel Security Mode

A mode of operation that provides a capability for various levels and categories or compartments of data to be concurrently stored and processed in an automated system and permits selective access to such material concurrently by users who have differing security clearances and need-to-know. Internal controls, as well as personnel, physical, and administrative controls, separate users and data on the basis of security clearance. The internal security controls must be thoroughly demonstrated to be effective in preventing unauthorized access to information. (AFR 205-16;)
A mode of operation in effect when at least some users with access to the system do not have a security clearance or need-to-know for all classified material in the information system. This mode provides the capability for the concurrent access to and use of the information system by uncleared users and users having different security clearances and need-to-know. The identification, segregation, and control of users and sensitive material on the basis of security clearance, and material classification category, and need-to-know must be essentially under automated control. Operation in this mode should be predicated on a comprehensive demonstration that the internal security controls can effectively prevent malicious attempts to bypass these controls. (AFR 700-10;)
The mode of operation which allows two or more classification levels of information to be processed simultaneously within the same system when some users are not cleared for all levels of information present. (CSC-STD-003-85;; NCSC-WA-001-85;)
A mode of operation wherein not all users have a clearance, formal access approval, and/or need-to-know for all data handled by the AIS. (DODD 5200. 28;)
A mode of operation under an operating system (supervisor or executive program) which provides a capability permitting various levels and categories or compartments of material to be concurrently stored and processed in an ADP system. In a remotely accessed resource-sharing system, the material can be selectively accessed and manipulated from variously controlled terminals by personnel having different security clearances and access approvals. This mode of operation can accommodate the concurrent processing and storage of: a) two or more levels of classified data, or b) one or more levels of classified data with unclassified data depending upon the constraints placed on the system by the Designated Approving Authority. (DODD 5200. 28M;)
An operation under an operating system (supervisor or executive program) which provides a capability permitting various categories and types of classified materials to be stored and processed concurrently in an ADP system and permitting selective access to such material concurrently by uncleared users having differing security clearances and need-to-know is accordingly accomplished by the operating system and associated system software. In a remotely accessed resource-sharing system, the material can be selectively accessed and manipulated from variously controlled terminals by personnel having different security clearances and need-to-know. This mode of operation can accommodate the concurrent processing and storage of: a) two or more levels of classified data, or b) one or more levels of classified data with unclassified data depending upon constraints placed on the system by the DAA (OPNAVINST 5239. 1A;)