SFTP
Secure file transfer protocol
SHTTP
Secure Hypertext Transfer Protocol
SRPC
Secure remote procedure call
SMDS
Switched Multimegabit Data Service
SME
Subject matter expert
SMS
Short message service/systems management server
SMTP
Simple Mail Transfer Protocol
SNA
System Network Architecture
SNMP
Simple Network Management Protocol
SNTP
Simple Network Time Protocol
SOA
Service-oriented architecture
SOAP
Simple Object Access Protocol/Service-oriented architecture protocol
SOCKS
Socket security
SOHO
Small office/home office
SOL
Single occurrence loss
SONET
Synchronous optical network
SOP
Standard operating procedure
SOW
Statement of work
SP
Service pack
SPA
Simple power analysis
SPI
Security Parameters Index
SPKI
Simple public key infrastructure
SPML
Service Provisioning Markup Language
SPX
Sequenced Packet Exchange
SQL
Structured Query Language
SRTP
Secure Real-Time Transport Protocol
SSDP
Simple Service Discovery Protocol
SSE-CMM
Systems Security Engineering Capability Maturity Model
SPX
Sequential packet exchange
SR
Service release
SS
Subscriber station
SSDP
Simple Service Discovery Protocol
SSH
Secure Shell
SSID
Service set identifier
SSL
Secure Sockets Layer
SSO
Single sign-on
SSP
Sensitive security parameter
ST
Security target
STD
State transition diagram
ST&E
Security test and evaluation
STIG
Security Technical Implementation Guide (by DISA for U.S. DoD)
STS
Security Token Service
SUID
Set-user-ID
SV&V
Software Verification and Validation
SVC
Switched Virtual Network
SWIFT
Society for Worldwide Interbank Financial Telecommunication
SYN
Synchronized
SZ
Security zone
T
TA
Timing analysis
TACACS
Terminal Access Controller Access Control System
TCB
Trusted computing base
TCG
Trusted computing group
TCP
Transmission Control Protocol
T/TCP
Transactional TCP
TCP/IP
Transmission Control Protocol/Internet Protocol
TCSEC
Trusted Computer System Evaluation Criteria
TDEA
Triple Data Encryption Algorithm (Triple DEA or Triple DES)
TDM
Time division multiplexing
TDMA
Time division multiple access
TEK
Traffic encryption key
TFTP
Trivial File Transfer Protocol
TGS
Ticket-granting service
TKIP
Temporal key integrity protocol
TLS
Transport layer security
TOC-TOU
Time-of-check to time-of-use
T&E
Test & evaluation
TOE
Target of evaluation
TOS
Trusted operating system
ToS
Type of Service
TPM
Trusted Platform Module
TQM
Total quality management
TS
Target server
TSIG
Transaction signature
TSN
Transition Security Network
TSP
Time- stamp Protocol
TTL
Time-to-Live
TTR
Time-to-recover
TTLS
Tunneled transport layer security
TTP
Trusted third party
U
UAC
User Account Control
UDDI
Universal description, discovery, and integration
UDF
Universal Disk Format
UDP
User Datagram Protocol
ULP
Upper layer protocol
UML
Unified modeling language
UPS
Uninterruptible power supply
URI
Uniform Resource Identifier
URL
Uniform Resource Locator
USB
Universal Serial Bus
V
V&V
Verification and Validation
VAN
Value-added network
VB
Visual Basic
VBA
Visual Basic for Applications
VBScript
Visual Basic Script
VDSL
Very high-speed DSL
VHD
Virtual hard drive
VHF
Very high frequency
VLAN
Virtual local-area network
VM
Virtual machine
VoIP
Voice over Internet Protocol
VPN
Virtual private network
VRRP
Virtual Router Redundancy Protocol
VSAT
Very small aperture terminal
W
W3C
World Wide Web consortium
WAN
Wide-area network
WAP
Wireless access point/Wireless application protocol
WBS
Work breakdown structure
WCCP
Web Cache Coordination Protocol
WCDMA
Wideband code division multiple access
WDM
Wavelength division multiplexing
WDMA
Wavelength division multiple access
WDP
Wireless Datagram Protocol
WEP
Wired Equivalent Privacy
WfMS
Workflow management system
WiFi
Wireless Fidelity
WiMax
Worldwide Interoperability for Microwave Access
WfMS
Workflow management system
WLAN
Wireless local-area network
WLL
Wireless local loop
WMAN