Glossary of Terms

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S

S

S&T

S/MIME (Secure MIME)

SA (Security association)

Sacred

Safeguarding Statement

Safety

Sagan

SAIL

SAISS

Salami Technique

Salt

Same-Day Service

SAMS

Samurai

Sandbox

SAO

SAP

SARK

Satellite Communications Security

Saturday-Night Special

SAV

Say

Scag

Scanner

Scanning attacks

Scanning Line Frequency

Scanning Line Length

Scanno

Scenario Analysis

SCG

SCI

Science-Fiction Fandom

Scientific And Technical Information

Scientific And Technical Intelligence

SCIF

SCOMP

Scope of an asset

SCP

Scratch

Scratch Pad Store

Screen saver password

Screening firewall

Screening router

Scripting language

Scripts

Scrog

Scrool

SCSI

ScumOS

SDLC

SDNRIU

SDNS

SDR

Search-And-Destroy Mode

SEC (Securities and Exchange Commission)

SecDef

Second

Secondary Channel

Secondary Damage

Secondary Distribution

Secondary RED Conductor

Secondary Station

Second-System Effect

Secretary Of Commerce

Secretary Of Defense

Secretary Of State

Sector

Secure Communications

Secure Communications Processor

Secure Configuration Management

Secure MIME (S/MIME)

Secure Operating System

Secure Shell (SSH)

Secure Sockets Layer (SSL)

Secure Subsystem

Secure System Operations

Secure Telecommunications And Information Handling Equipment

Secure Telephone Unit

Secure Working Area

Securities and Exchange Commission (SEC)

Security Administrator

Security Advisory/information Memorandum

Security And Privacy Advisory Board

Security Architecture

Security association (SA)

Security Audit Trail

Security audits

Security awareness

Security Awareness And Training

Security baseline

Security breach

Security center

Security Classification Guide

Security Cost Benefit Analysis

Security Countermeasures

Security Criteria

Security Critical

Security Critical Mechanisms

Security department

Security Design Review

Security Directives

Security Domains

Security Education

Security Engineering

Security Environment

Security Evaluation

Security Fault Analysis

Security Features

Security Features Users' Guide

Security Filter

Security Flow Analysis

Security Functional Testing

Security Incident

Security Inspection

Security Inspections

Security Interest

Security Kernel

Security Measures

Security Mechanisms

Security Module

Security Officer

Security Officers

Security Parameters

Security patches

Security Perimeter

Security policies

Security Policy

Security Policy Model

Security Product Integration

Security Product Testing/Evaluation

Security Products

Security Relevant Event

Security Relevant Portion

Security Requirements

Security Requirements Baseline

Security Requirements For Automatic Information Systems (AISs)

Security Reviews

Security Safeguards

Security Service

Security Specification

Security Specifications

Security Staffing Requirements

Security Test And

Security Test And Evaluation

Security Testing

Security Threat

Security Through Obscurity

Security Training

Security Violation

Security Violations Reporting Process

Security-Enhanced LINUX

Security-Relevant Event

Security-Relevant Functions

Seek

Seepage

Segment

Segmentation Fault

Segmented Encoding Law

Selective Field Protection

Self-Authentication

Self-Certification

Self-defense training

Sender

Sensitive Application

Sensitive Business Data

Sensitive But Unclassified

Sensitive Compartmented Information

Sensitive Compartmented Information Facility

Sensitive Compartmented Intelligence

Sensitive Defence Information

Sensitive Defense Information

Sensitive Information

Sensitive Nuclear Material Production Information

Sensitive personal information

Sensitive Software

Sensitive System

Sensitive Unclassified Information

Sensitivity And Criticality

Sensitivity And Criticality Assessment

Sensitivity Assessment

Sensitivity Label

Sensitivity Level

Sensor

Separation Of Duties

Separation Of Privilege

Separation of responsibilities

Sequence number

Sequential Access

Sequential Logic Element

Sequential processing

Serial

Serial Digital Computer

Serial Transmission

Serial-To-Parallel Converter

Server

Server-side programming

Service

Service Feature

Service Interruption Hazard

Service Set Identifier (SSID)

Services and Applications

Session

Session hijacking

Session Security Level

Set

Sextet

S-F

SFA

SFUG

SFUG:D1

SFUG:D2

SHA-1

Shadow password file

Shared password

Sharing

Sharing Of Software

Shell

Shielded Enclosure

Shielded Enclosures

Shift Left (or Right) Logical

Shim

Short Range Plan

Shotgun Debugging

Shoulder Surfing

Shredding tools

Shriek

SI

Sidecar

Sieve

SIG

SIGINT

Signal

Signal Intelligence

Signal Security

Signals Intelligence

Signals Security

Signal-To-Noise Ratio

Signature recognition

Significant Change

Significant Computer Security Incident

Significant Condition

Significant Digit

Significant Instant

Significant Modification

Significant Risk Of Telecommunications Exploitation

SIGNIN

Signing

SIGNON

SIGSEC

SIGSEC Signals Analysis

Silicon

Silo

Simple Buffering

Simple Mail Transfer Protocol (SMTP)

Simple Scanning

Simple Security

Simple Security Condition

Simple Security Property

Simplex Operation

Since Time T Equals Minus Infinity

Single Integrated Operational Plan-Extremely Sensitive Information (SIOP-ESI)

Single Point Keying

Single points of vulnerability

Single sign-on (SSO)

Single-Level Device

Single-message break-in

Single-User Hosts

SISS

Site

Site-to-site VPNs

Skrog

Skulker

Slab

Slack

Slap On The Side

Slash

Sleep

Slim

Slop

Slot

Slurp

Smart

Smartcards/Token Authentication

Smash The Stack

Smiley

SMM

SMO

Smoke

Smoke And Mirrors

SMOP

SMTP (Simple Mail Transfer Protocol)

SMTP relay proxy server

SMU

Smurf

SNAFU Principle

Snail

Snap

Snap-in

Snarf

Snark

Sneaker

Sniff

Sniffer

Snivitz

SO

Social Engineering

Social Science Number

Socket

SOCKS

Software Architecture Study

Software Asset Management

Software Development Methodologies

Software Engineering

Software Interface Functions

Software Licensing

Software Piracy

Software Security

Software System Test

Software System Test And Evaluation Process

Softy

SOH

SOHO

SOIC

Solaris

Solid-State Scanning

SON

Sorcerer's Apprentice Mode

SORD

Sort

SOS

Source

Source Of All Good Bits

SOW

Space

Space Systems Security

Space-Cadet Keyboard

Spaghetti Inheritance

Spam

Spare

Special Access Program(s) (SAP)

Special Markings

Special Mission

Special Mission Modification

Special permissions

Special Purpose Computer

Spell

Spiffy

Spike

Spin

SPK

Spl

Splat

Split Knowledge

SPO

Spod

Spoiler

Sponge

Sponsor Of Data

Spool

Spread Spectrum

Spread Spectrum Analysis

SPS

Spy

Spyware

Squirrelcided. Stack

SRI

SRP

SRR

SSE

SSH (Secure Shell)

SSID

SSL (Secure Sockets Layer)

SSMP

SSO

SSO (single sign-on)

SSR

ST&E

ST&E Tools And Equipment

Stand Alone Security Mode

Stand Alone Security Mode Of Operation

Stand Alone, Shared Automated Information System

Stand Alone, Single-User Automated Information System

Stand-alone NIDS

Stand-Alone Systems And Remote Terminals

Stand-Alone, Shared System

Stand-Alone, Single-User System

Standard Measurement Point

Standard permissions

Standards architecture

Standards Of Conduct

STAPLE

STAR

Star (*) Property

Star Property (* Property)

START

Start-Stop Character

Start-Stop Modulation

Start-Stop System

Start-Stop Transmission

Start-Stop TTY Distortion

State

State Delta Verification System

Stateful firewall

Stateful inspection

Statement Of Need

Statement Of Work

Static packet filtering

Static webpages

Station

Statistical analysis

STD

STI

Stiffy

Stir-Fried Random

Stone Knives And Bearskins

Stop-Record Signal

Storage

Storage Area Controls

Storage Element

Storage Media Protection And Control

Storage Register

Storage Resource

Store

Store-And-Forward

Stored-Program Computer

Stream encryption

Streaming Tape Drive

Streaming Tape Recording

Strided

String

Stroke

Structured Programming

Structured Protection

Strudel

STS

STU

Studly

Stupids

STX

Su (switch user)

SUB

Subcommittee On Automated Information Systems Security (SAISS)

Subcommittee On Automated Information Sytemse Security (SAISS)

Subcommittee On Compromising Emanations

Subcommittee On Telecommunications Security

Subject

Subject Security Level

Subject Sensitivity Level

Subject's Security Level

Subnet

Subscriber Sets And End Terminal Equipments

Successful Block Delivery

Successful Block Transfer

Successful Disengagement

Suit

Summation Check

Super Source Quench

Superencryption

Superprogrammer

Supervisor State

Supervisory Control

Supervisory Program

Supervisory Routine

Supervisory Signals

Support

Suppression Measure

Surf

Surreptitious scanning

Survivable Operation

SVRR

Swab

Swap

Swizzle

Symbolic Language

Symmetric key encryption

SYN

SYN Flooding DoS attacks

SYN/ACK

Sync

Synchronization

Synchronization Bit

Synchronization Code

Synchronization Flags

Synchronized Network

Synchronous Communication

Synchronous Crypto-Operation

Synchronous Data Link Control

Synchronous Data Network

Synchronous Idle Character

Synchronous Network

Synchronous TDM

Synchronous Transfer Mode

Synchronous Transmission

Syntactic Sugar

Syntax

SYSADM

Sysape

SYSGEN

Syslog

Sysop

System

System Administration

System Administrator

System Analysis

System Architecture

System Development

System Development Methodologies

System Documentation

System Environment

System Generation

System High Mode

System High Mode Or System High Security Mode

System High Security Mode

System Indicator

System Integration

System Integrity

System Integrity Procedures

System Life Cycle

System Of Records

System Operational Threshold

System Operator

System Overhead Information

System Programmer

System Security

System Security Architecture Study

System Security Engineering

System Security Evaluation

System Security Management Plan

System Security Map

System Security Officer

System Software

System Software Controls

System Test Time

System Testing And Evaluation Process

Systematic monitoring

System-High Mode

Systems administration

Systems administrator

Systems Analysis

Systems penetration

Systems Security Steering Group

SysVile

Sensitive Information

Any information which requires a degree of protection and which should not be made generally available. (FIPS PUB 39)
Information that, as determined by a competent authority, must be protected because its unauthorized disclosure, alteration, loss, or destruction will at least cause perceivable damage to someone or something. (DOD 5200. 28-STD; CSC-STD-003-85; CSC-STD-004-85)
Any information, the loss, misuse, or unauthorized access to or modification of which could adversely affect the national interest or the conduct of Federal programs, or the privacy to which individuals are entitled under section 552a Of title 5, United States Code (the Privacy Act) but which has not been specifically authorized under criteria established by an executive order or an Act of Congress to be kept secret in the interest of national defense or foreign policy. (PL 100-235)
Any information, the loss, misuse, modification of, or unauthorized access to, could affect the national interest or the conduct of federal programs, or the privacy to which individuals are entitled under Section 552a of Title 5, U. S. Code, but that has not been specifically authorized under criteria established by an Executive Order or an act of Congress to be kept classified in the interest of national defense or foreign policy. (NCSC-TG-004-88)
See SENSITIVE UNCLASSIFIED INFORMATION.