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D

D&V

D. C. Power Lab

D-A

DAA

DAC

DAC/D1

DAC/D2

DAC/D3

Daemon

DAMA

Dangling Pointer

Dangling Threat

Dangling Vulnerability

Dark-Side Hacker

Data

Data Abstraction

Data Access Control

Data Arrangement

Data Authentication Algorithm

Data Base Management System

Data Communication

Data Communication Control Character

Data Communication Control Procedure

Data Communications Equipment

Data Compaction

Data Compression

Data Concentrator

Data Contamination

Data Corruption

Data Dictionary

Data Encrypting Key

Data Encryption

Data Encryption Standard

Data Encryption Standard (DES)

Data Flow Control

Data Intelligence

Data Interface Capability

Data Link Control

Data Link Escape Character

Data Link Layer

Data Origin Authentication

Data Processing

Data Processing Center Security

Data Processing Fund

Data Protection Directive

Data Protection Engineering

Data Related Emanations

Data Scavenging

Data Service Unit

Data Terminal Equipment

Data Transfer Rate

Data Transfer Request Signal

Data Transfer Time

Data Transmission

Data Transmission Circuit

Data Volatility

Database Integrity

Database Management System

Database replication

Data-Dependent Protection

DATAINT

Date And Time Of Event

DAU

DBMS

DC

DCA

DCID

DCP

DCS

DCS1000

DCSP

Dd

DD:D1

DD:D2

DDD

DDN

DDoS (Distributed DoS)

DDS

DDT

Dead

Debug

DEC

Decay

Deception Means

Decertification

Decision criterion

Deckle

Declassification

Declassification (of Magnetic Storage Media)

Declassification Of AIS Storage Media

Declassification Of Magnetic Storage Media

Declassification/Downgrade Of Media

Decode

Decrypt

Decryption method

DED

Dedicated Security Mode

Default

Default Classification

Defence Industry Information

Defense Advanced Research Projects Agency (DARPA)

Defense Data Network

Defense in depth

Definition Of Security Features

Degauss

Degausser Products List (DPL)

Degree Of Trust

Dehose

Delegated Development

Delegated Development Program

Delegation Of Authority

Deletion Of Accounts

Delint

Delivered Block

Delivered Overhead Bit

Delivered Overhead Block

Delivery Confirmation

Delta

Demarcation Point

Demigod

Demilitarized zone (DMZ)

Demo

Demon

Denial Of Service

Denial-of-service (DoS)

Deny

Department Of Commerce

Department Of Defence

Department Of State

Deployable Computer System

De-Rezz

Derf

DES

Descriptive Top Level Specification

Descriptive Top-Level

Descriptive Top-Level Specification

Design Analysis Phase

Design Controlled

Design Controlled Spare Part

Design Controlled Spare Pary

Design Documentation

Design Objective

Design Verification

Designated Approving

Designated Approving Authority

Designated Development Activity

Destination unreachable

Detectable Actions

Detection System

Detective Controls

Development (Life Cycle)

Development server

Devo

DF

Diagnostic Program

Dial Number Indicator

Dialog

Dial-Up

Dial-Up Diagnostic

Dial-Up Security

DIB

Dibit

Dictionary attacks

Dictionary Flame

DID

Diddle

Die

Diff

Differential backup

Diffie-Hellman key agreement

Digit

Digit Time Slot

Digital

Digital Alphabet

Digital certificate

Digital Combining

Digital Computer

Digital Facsimile Equipment

Digital Modulation

Digital Signature

Digital watermarking

Digital/Analog Technology

Digital-To-Analog Converter

Digraphic Processing

Dike

Ding

Dink

Dinosaurs Mating

DIP

Direct Memory Access

Direct Memory Access Controllers

Direct Memory Access Devices

Direct Shipment

Direction Finding

Directionalization

Director Of The Office Of Management And Budget

Directory traversal attack

Disaster Recovery

Disaster Recovery Plan Testing

Disaster Recovery Planning

Disaster Recovery Plans

Disclosure Of Sensitive Data

Discounted cash flow analysis

Discovery process

Discretionary Access

Discretionary Access Control

Discretionary Access Control Mechanism

Discretionary Protection

Discretionary Security Protection

Disengagement Attempt

Disgruntled Employees

DISJ

Diskless Workstations

Disposition Of Classified Information

Disposition Of Media And Data

Dissemination Control

Dissemination Controls

Dissemination Of Information

Dissociated Press

DIST

Distributed AIS

Distributed Computer System

Distributed DoS (DDoS)

Distributed firewall architecture

Distributed IDS

Distributed Processing

Distributed Systems Security

Distribution Statement

Distribution System

DLE

DLED

DMA

DMZ (demilitarized zone)

DO

Doc

Doco

Document format standards

Document Labeling

Document transfer standards

Documentation Policies

DOD

DoD 5200. 28-STD

DoD 5200. 28-STD, 1985

DoD 5200. 28-STD.

DoD Directive 5200. 28

DoD Directive 5200. 28 Automated Information System Security.

DoD Directive 5215. 1

DoD Information Analysis Center

DOD Technology Transfer

DoD Trusted Computer

DoD Trusted Computer System Evaluation Criteria

DoD Trusted Computer System Evaluation Criteria (TCSEC)

DODD

Dodgy

DOE

Dogcow

Dogpile

Dogwash

Domain

Domain controller

Dominate Security Level

DON

Dongle

Don't Do That, Then!

Donuts

DOS

DoS (denial-of-service)

Down

DP

DPB

Dper

DPL

Dragon

Drain

DRECNET

Drive-by hacking

Driver

Droid

Drool-Proof Paper

Drop

Drop Accountability

Drop And Insert

Drop On The Floor

Drop-Off/Add-On Protection

Drugged

Drum

Drunk Mouse Syndrome

DS

DSN

DSU

DSVT

DT&E

DTD

DTE

DTIRP

DTLS

DTS

DUA

Dual In-Line Package Switch

Dump

Dumpster Diving

DWIM

Dynamic port numbers

Dynamic webpages

Dynamically Adaptive Routing

Dynner

Diff

N. A change listing, especially giving differences between (and additions to) source code or documents (the term is often used in the plural `diffs'). "Send me your diffs for the Jargon File!" Compare vdiff.
Specifically, such a listing produced by the `diff(1)' command, esp. when used as specification input to the `patch(1)' utility (which can actually perform the modifications; see patch). This is a common method of distributing patches and source updates in the UNIX/C world.
v. To compare (whether or not by use of automated tools on machine-readable files); see also vdiff, mod.