Security AccreditationThe official management decision given by a senior agency official to authorize operation of an information system and to explicitly accept the risk to…
Security AttributeA security-related quality of an object. Security attributes may be represented as hierarchical levels, bits in a bit map, or numbers.
Security AuthorizationThe official management decision given by a senior agency official to authorize operation of an information system and to explicitly accept the risk to…
Security CategoryThe characterization of information or an information system based on an assessment of the potential impact that a loss of confidentiality, integrity, or…
Security Control BaselineThe set of minimum security controls defined for a low-impact, moderate-impact, or high-impact information system.
Security Control EnhancementsStatements of security capability to: 1) build in additional, but related, functionality to a basic control; and/or 2) increase the strength of a basic…
Security ControlsThe management, operational, and technical controls (i.e., safeguards or countermeasures) prescribed for an information system to protect the…
Security DomainA set of subjects, their information objects, and a common security policy.
Security GoalsThe five security goals are confidentiality, availability, integrity, accountability, and assurance.
Security Impact AnalysisThe analysis conducted by an agency official, often during the continuous monitoring phase of the security certification and accreditation process, to…
Security LabelExplicit or implicit marking of a data structure or output media associated with an information system representing the FIPS 199 security category, or…
Security LevelThe combination of hierarchical classification and a set of non-hierarchical categories that represents the sensitivity of information.
Security PolicyThe set of laws, rules, and practices that regulate how an organization manages, protects, and distributes sensitive information.
Security RequirementsRequirements levied on an information system that are derived from laws, executive orders, directives, policies, instructions, regulations, or…
Security ServiceA capability that supports one, or many, of the security goals. Examples of security services are key management, access control, and authentication.
Security TagInformation unit containing a representation of certain security-related information (e.g., a restrictive attribute bit map).
SegmentationA process by which path control divides basic information units into smaller units, called BIU segments, to accommodate smaller buffer sizes in adjacent…
Senior Agency Information Security OfficerOfficial responsible for carrying out the Chief Information Officer responsibilities under the Federal Information Security Management Act (FISMA) and…
SensitivityWhen referring to a medical test, sensitivity refers to the percentage of people who test positive for a specific disease among a group of people who have…
Sensitivity LevelsA graduated system of marking (e.g., low, moderate, high) information and information processing systems based on threats and risks that result if a…
sensorA device that responds to a stimulus, such as heat, light, or pressure, and generates a signal that can be measured or interpreted.
Sensor AgingThe gradual degradation in performance of a sensor over time.
ServerAny computer on a network that contains data or applications shared by users of the network on their client PCs.
SHA-1Secure Hash Algorithm, for computing a condensed representation of a message or a data file specified by FIPS PUB 180-1.
Shared SecretA secret used in authentication that is known to the claimant and the verifier.
Signature CertificateA public key certificate that contains a public key intended for verifying digital signatures rather than encrypting data or performing any other…
Signature DynamicsA behavioral biometric modality that analyzes dynamic characteristics of an individual's signature, such as shape of signature, speed of signing, pen…
Signature GenerationUses a digital signature algorithm and a private key to generate a digital signature on data.
Signature VerificationUses a digital signature algorithm and a public key to verify a digital signature.
Signed DataData on which a digital signature is generated.
Similarity ScoreA value returned by a biometric algorithm that indicates the degree of similarity or correlation between a biometric sample and a reference.
Single-Hop ProblemThe security risks resulting from an mobile software agent moving from its home platform to another platform.
SkimmingThe act of obtaining data from an unknowing end user who is not willingly submitting the sample at that time.
Slap FingerprintFingerprints taken by simultaneously pressing the four fingers of one hand onto a scanner or a fingerprint card, as illustrated below.
Smart CardA credit card size device which contains a microprocessor, memory and a battery.
SMShingExactly like Phishing, however instead of email being used, SMS (text) messages are sent to the victims cell phone, which lead them to the fake webpage.
SnifferThe name of the filter program used by the Infoseek search engine to prevent spamdexing.
Social EngineeringAn attempt to trick someone into revealing information (e.g., a password) that can be used to attack systems or networks.
Software-Based Fault IsolationA method of isolating application modules into distinct fault domains enforced by software.
SpamUnelicited emails in large quantities; rapidly repeated scrolling text.
Speaker RecognitionA biometric modality that uses an individual�s speech, a feature influenced by both the physical structure of an individual's vocal tract and…
Speaker Recognition EvaluationsAn ongoing series of evaluations of speaker recognition systems. For more information, visit www.nist.gov/speech/tests/spk/index.htm.
Spear PhishingTargeting phishing attacks. Perpetrators will only target a specific group of people, or a specific person, in a highly-customized attempt at obtaining…
Speech RecognitionA technology that enables a machine to recognize spoken words. Speech recognition is not a biometric technology.
Split KnowledgeA procedure whereby a cryptographic key is handled as multiple key components from the time that the key or the separate key components are generated…
SpoofingSome market analysts maintain that the increased volatility in stock markets may be the result of an illegal practice known as spoofing, or phantom bids.
SpywareSoftware programs which spy on web users, often used to collect consumer research and to behaviorally targeted ads.
Standarda statement that describes an acceptable level of performance, excellence, or attainment in that particular activity.
Standard TopographyThe format and information required to be displayed on a PIV card. Also known as the Mandatory Topography.
StateState means one of the 50 States, the District of Columbia, Guam, Puerto Rico, Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands.
Static KeysStatic keys are relatively long-lived and are common to a number of executions of a given algorithm.
SteganographyThe hiding of information within a more obvious kind of communication. Although not widely used, digital steganography involves the hiding of data inside…
SubjectThe Subject of an email message should be a short summary of its contents. Email clients usually display it in a mailbox display together with the sender.
Submissionany single delivery of evidence in a specific investigation.
Subordinate Certification Authority (CA)In a hierarchical PKI, a Certification Authority whose certificate signature key is certified by another CA, and whose activities are constrained by that…
SubscriberA party who receives a credential or token from a CSP and becomes a claimant in an authentication protocol.
SubsystemA functional grouping of components that combine to perform a major function within an element, such as attitude control and propulsion.
Superior Certification Authority (CA)In a hierarchical PKI, a Certification Authority who has certified the certificate signature key of another CA, and who constrains the activities of that…
Symmetric KeyA cryptographic key that is used to perform both the cryptographic operation and its inverse, for example to encrypt and decrypt, or create a message…
SystemPhysically connected generation, transmission, and distribution facilities operated as an integrated unit under one central management, or operating…
system administratorThe person responsible for configuring and administering the enterprise's computers, networks, and software systems.
System Development Life Cycle (SDLC)The scope of activities associated with a system, encompassing the systems initiation, development and acquisition, implementation, operation and…
System IntegrityThe quality that a system has when it performs its intended function in an unimpaired manner, free from unauthorized manipulation of the system, whether…
System InterconnectionThe direct connection of two or more IT systems for the purpose of sharing data and other information resources.
System Security PlanFormal document that provides an overview of the security requirements for the information system and describes the security controls in place or planned…
System SoftwareThe special software within the cryptographic boundary (e.g., operating system, compilers or utility programs) designed for a specific computer system or…
System-specific Security ControlA security control for an information system that has not been designated as a common security control.
Technical ControlsThe security controls (i.e., safeguards or countermeasures) for an information system that are primarily implemented and executed by the information…
Technical non-repudiationThe contribution of public key mechanisms to the provision of technical evidence supporting a non-repudiation security service.
Technology EvaluationOne of the three types of performance evaluations. The primary goal of a technology evaluation is to measure performance of biometric systems, typically…
TEMPESTTEMPEST is an unclassified short name referring to investigation and studies of compromising emanations.
Templatea standard shape that the race car must comply to be within the NASCAR rules. The template closely resembles the shape of the factory car.
ThreatRelated to Aggro. This is what a character "gives off" to generate or draw monster aggro.
Threat Agent/SourceEither: 1) intent and method targeted at the intentional exploitation of a vulnerability; or 2) a situation and method that may accidentally trigger a…
Threat AnalysisThe examination of threat sources against system vulnerabilities to determine the threats for a particular system in a particular operational environment.
Threat AssessmentFormal description and evaluation of threat to an information system.
Threat SourceThe intent and method targeted at the intentional exploitation of a vulnerability or a situation and method that may accidentally trigger a vulnerability.
Thresholdthe point a system must cross to enter a new state or condition.
Throughput RateThe number of biometric transactions that a biometric system processes within a stated time interval.
topologyThe geometric arrangement of a computer system. Common topologies include a bus (network topology in which nodes are connected to a single cable with…
Total RiskThe potential for the occurrence of an adverse event if no mitigating action is taken (i.e.
Tracking CookieA cookie placed on a users computer to track the users activity on different Web sites, creating a detailed profile of the users behavior.
Traffic AnalysisA form of passive attack in which an intruder observes information about calls (although not necessarily the contents of the messages) and makes…
Training (Information Security)Training strives to produce relevant and needed (information) security skills and competencies.
Training EffectivenessA measurement of what a given student has learned from a specific course or training event.
Training Effectiveness EvaluationInformation collected to assist employees and their supervisors in assessing individual students subsequent on-the-job performance, to provide trend data…
Transport Layer Security (TLS)(TLS)A cryptographic protocol that provides security for communication over the Internet. Its predecessor is Secure Sockets Layer (SSL).
Triple DESAn implementation of the Data Encryption Standard (DES) algorithm that uses three passes of the DES algorithm instead of one as used in ordinary DES…
Trojan horseA computer program with an apparently or actually useful function that contains additional (hidden) functions that surreptitiously exploit the legitimate…
True Accept RateA statistic used to measure biometric performance when operating in the verification task.
True Reject RateA statistic used to measure biometric performance when operating in the verification task.