Process control system
PDA
Personal digital assistant
Portable document format
PDP
Policy decision point
PDS
Protective distribution systems
PEAP
Protected Extensible Authentication Protocol
PEM
Privacy enhanced mail
PEP
Policy enforcement point
PERT
Program evaluation and review technique
PGP
Pretty Good Privacy
PHP
PHP hypertext preprocessor
PIA
Privacy impact assessment
PII
Personally identifiable information
PIN
Personal identification number
PIP
Policy information point
PIV
Personal identity verification
PKCS
Public key cryptography standard
PKI
Public key infrastructure
PKM
Privacy key management
POA&M
Plan of action and milestones
POC
Point of contact/proof of concept
POP
Post office protocol/proof-of-possession
POS
Point-of-sale
POTS
Plain old telephone service
PP
Protection profile
PPD
Port protection device
PPP
Point-to-Point Protocol
PPTP
Point-to-Point-Tunneling Protocol
PRNG
Pseudorandom number generator
PSK
Pre-shared key
PSP
Public security parameters
PSTN
Public switched telephone network
PTM
Packet transfer mode
PVC
Permanent Virtual Circuit
PVP
Patch and vulnerability group
Q
QA
Quality assurance
QC
Quality control
QoP
Quality of protection
QoS
Quality of service
R
RA
Registration authority
RAD
Rapid application development
RAdAC
Risk adaptive access control
RAD
Rapid application development
RADIUS
Remote Authentication Dial-In User Service
RAID
Redundant array of independent disks
RAM
Random access memory
RAP
Rapid application prototyping
RARP
Reverse Address Resolution Protocol
RAS
Remote Access Server/Registration, Admission, Status channel
RAT
Remote Administration Tool
RBAC
Role-based access control
RBG
Random bit generator
RC
Rivest cipher
RCP
Remote Copy Protocol
RDBMS
Relational database management system
RDP
Remote Desktop Protocol
RED
Random early detection
REP
Robots exclusion protocol
RF
Radio frequency
RFC
Request For Comment
RFI
Radio frequency interference/request for information
RFID
Radio frequency identification
RFP
Request for proposal
RFQ
Request for quote
RIB
Routing information base
RIP
Routing Information Protocol
RMF
Risk management framework
RNG
Random number generator
ROE
Rules of engagement
ROI
Return On Investment
ROM
Read-only memory
RPC
Remote procedure call
RPO
Recovery point objective
RR
Resource record
RS
Relay station
RSA
Rivest-Shamir-Adelman (algorithm)
RSBAC
Ruleset-based access control
RSN
Robust security network
RSO
Reduced sign-on
RSS
Really simple syndication
RSTP
Real-time streaming protocol
RSVP
Resource reservation protocol
RTCP
Real-time transport control protocol
RTF
Rich Text Format
RTO
Recovery time objective
RTP
Real-Time Transport Protocol
RuBAC
Rule-based access control
S
S/MIME
Secure/multipurpose (multipart) Internet mail extensions
SA
Security Association/source address
SACL
System access control list
SAD
Security association database
SAFER
Secure and fast encryption routine
SAML
Security assertion markup language
SAN
Storage area network
SAS
Statement on auditing standards
SATA
Serial ATA (advanced technology attachment)
S-BGP
Secure border gateway protocol
SC
Supply chain
SCAP
Security Content Automation Protocol
SCP
Secure Copy Protocol
SCM
Software configuration management
SCSI
Small Computer Systems Interface
SCTP
Stream Control Transmission Protocol
SD
Secure digital
SDLC
System development lifecycle/Synchronous DataLink Control
SDP
Service Discovery Protocol
SDSL
Symmetrical DSL
SEI
Software Engineering Institute
SEM
Security event management
SET
Secure electronic transaction
SFTP
Secure file transfer protocol
SHA
Secure hash algorithm
SHS
Secure hash standard
SIA
Security impact analysis
SID
Security Identifier
SIM
Subscriber identity module
SIP
Session Initiation Protocol
SKEME
Secure Key Exchange Mechanism
SKIP
Simple Key Management for Internet Protocol
SLA
Service-level agreement
SLIP
Serial Line Interface Protocol