Telecommunications terms starting with S

935 terms

Sector A sector is a segment of the economy that shares distinctive characteristics, such as telecommunications or energy.
sector alignment A copy-protection technique for copy protection that determines whether a diskette is an unauthorized copy by checking whether sectors are positioned…
sectoring In magnetic or optical disk storage media, the division of tracks into a specified number of segments, for the purpose of organizing the data stored…
secure communications Telecommunications deriving security through use of type 1 products and/or protected distribution systems. [INFOSEC-99]
secure hash standard [The] specification for a secure hash algorithm that can generate a condensed message representation called a message digest. [INFOSEC-99]
secure operating system Resident software controlling hardware and other software functions in an information system (IS) to provide a level of protection or security appropriate…
secure state [The] condition in which no subject can access any object in an unauthorized manner. [INFOSEC-99]
secure subsystem [A] Subsystem containing its own implementation of the reference monitor concept for those resources it controls.
secure telephone unit See STU.
secure transmission In transmission security, see secure communications. 2. In spread-spectrum systems, the transmission of binary coded sequences that represent information…
secure voice cord board See SECORD.
Security The term "security" covers a broad variety of financial instruments, including stock, promissory notes, bonds, debentures, limited partnership interests…
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security administrator 1. An authority (a person or group of people) responsible for implementing the security policy for a security domain [ECMATR46]. 2.
security alarm A security-related event that has been identified by a security policy as a potential breach of security. [T1.233-1993]
Security Architecture The portion of the baseline SDS architecture that is responsible for preserving the confidentiality, integrity, and assured service of any of the…
Security Attribute A security-related quality of an object. Security attributes may be represented as hierarchical levels, bits in a bit map, or numbers.
security attributes A set of properties associated with a principal. Security attributes can be associated with a principal by an authentication protocol or by a J2EE product…
security audit 1. Of data processing operations, an independent review and examination of system records and activities to (a) determine the adequacy of system controls…
security audit message left
security audit record left
security audit trail left
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Security Category The characterization of information or an information system based on an assessment of the potential impact that a loss of confidentiality, integrity, or…
security certificate A set of security relevant data which is protected by integrity and data origin authentication from an issuing security authority, and includes an…
security class The combination of classification, categories and caveats associated with an object [CESG].
security classification A classification placed on records limiting their accessibility to those having specific authority to retrieve or use them See also restricted access.
security clearance 1. The formal authorization by the Departmental Security Officer for an individual to have access to classified information, following appropriate vetting…
Security Domain A set of subjects, their information objects, and a common security policy.
security enforcing justify
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security exchange The mechanism for conveying, or the conveyance of, security-related information between two entities. [After X9.41]
security facility A set of logically associated security functions as used in the security framework [ECMATR46].
security facility interaction The invocation of a function a security facility by another security facility [ECMATR46].
security fault analysis [An] Assessment, usually performed on information system (IS) hardware, to determine the security properties of a device when hardware fault is…
security fault notification Report prepared by a CLEF and initially distributed to the Certification Body (CB).
security filter In communications security, the hardware, firmware, or software used to prevent access to specified data by unauthorized persons or systems, such as by…
security flaw [An] Error of commission or omission in an information system (IS) that may allow protection mechanisms to be bypassed. [INFOSEC-99]
security function A discrete aspect of the performance of a system by which it enforces security automatically on behalf of the System Manager and /or system users [CESG].
security interaction policy Common aspects of security policies necessary in order for interactions to take place between domains [10181-1]..
security kernel 1. In computer and communications security , the central part of a computer or communications system hardware, firmware, and software that implements the…
Security Label Explicit or implicit marking of a data structure or output media associated with an information system representing the FIPS 199 security category, or…
Security Level The combination of hierarchical classification and a set of non-hierarchical categories that represents the sensitivity of information.
security life The time over which cryptographically protected data or other security processes have value. [After X9.67]
security management In network management, the set of functions (a) that protects telecommunications networks and systems from unauthorized access by persons, acts, or…
security measure A means by which a System Security Policy is enforced [CESG]. Note: A general term, covering technical, procedural and management aspects of security.
security mechanism The logic or algorithm that implements a particular security enforcing or security relevant function in hardware and software [ITSEC].
security model A mathematical or conceptual representation for specifying and proving system security [CESG].
security object An entity in a passive role to which a security policy applies [ECMATR46].
Security Objective Confidentiality, integrity, or availability.
security operating procedures (SyOPs) Documentation specifying the procedures that are to be carried out by system users (including the System Administrator and operators) to uphold all…
Security Perimeter SEE Accreditation Boundary.
Security Policy The set of laws, rules, and practices that regulate how an organization manages, protects, and distributes sensitive information.
security policy model (SPM) 1. An informal presentation of a formal security policy model [POSIX.6]. 2. An informal presentation of a formal security policy model [TCSEC]. 3.
security range [The] highest and lowest security levels that are permitted in or on an information system (IS), system component, subsystem, or network. [INFOSEC-99]
security relevant That which is not security enforcing, but must function correctly for the Target of Evaluation to enforce security [ITSEC].
Security Relevant Event Any event that attempts to change the security state of the system. Also, any event that attempts to violate the security policy of the system.
security requirement The statement by the Departmental Security Officer (DSO) of the minimum standards to be met by a specific system and particular threats which are to be…
security safeguards Protective measures and controls prescribed to meet the security requirements specified for an information system (IS).
Security Service A capability that supports one, or many, of the security goals. Examples of security services are key management, access control, and authentication.
security specification Detailed description of the safeguards required to protect an information system (IS). [INFOSEC-99]
security sub-domain A proper subset of a security domain's entities which are subject to a security policy which possesses the following properties: 1.
security subject An entity in an active role to which a security policy applies [ECMATR46].
security target (ST) 1. A set of security functional and assurance requirements and specifications to be used as the basis for evaluation of an identified product or system. 2.
security test and evaluation Examination and analysis of the safeguards required to protect an information system (IS), as they have been applied in an operational environment, to…
Security Testing A process used to determine that the security features of a system are implemented as designed and that they are adequate for a proposed application…
security token A cryptographically signed data unit that expresses one or more claims.
SEED Botanically, the matured ovule without accessory parts. Colloquially, anything which may be sown; i.e.
seed key [In INFOSEC, an] initial key, used to start an updating or key generation process. [INFOSEC-99]
seek To position selectively the access mechanism of a direct access [storage] device.
seek time The time required for the access arm of a direct-access storage device to be positioned on the appropriate track. Synonym positioning time.
Segment A grouping of elements that are closely related and often physically interface. It consists of CIs produced by several contractors and integrated by one.
segmented encoding law An encoding law in which an approximation to a curve defined by a smooth encoding law is obtained by a number of linear segments.
segregation For genes, the separation of allele pairs from one another and their resulting assortment into different cells at meiosis.
seizing The temporary dedication of various parts of a communications system to a specific use, usually in response to a user request for service.
seizure signal In telephone systems, a signal used by the calling end of a trunk or line to indicate a request for service.
selcall Acronym for selective calling. Calling from one station in which call identification is sent to signal automatically one or more remote stations and to…
selected network For a particular message path, any intermediate network between a branch point and a subsequent branch point or convergence point is a selected network.
selection position Synonym decision instant.
selective calling See selcall.
selective combiner Synonym maximal-ratio combiner.
selective fading Fading in which the components of the received radio signal fluctuate independently.
selective field protection The protection of specific fields within a message which is to be transmitted [7498-2].
selective jamming See electronic warfare.
selective ringing In a party line, ringing only the desired user instrument. Note: Without selective ringing, all the instruments on the party line will ring at the same…
Selectivity Refers to choosing a subset of targets either for attack or defense. (See Preferential Defense and Preferential Offense.)
self-authentication A procedure in which a transmitting station , i.e., a calling station, establishes its own validity without the participation of the receiving station, i.
self-delineating block A block in which a bit pattern or a flag identifies the beginning or end of a block.
self-electro-optic effect device See SEED.
self-focusing In the optical regime, the property of an element (rod or slab of material) that (a) has a refractive index gradient that is a defined function of the…
self-relative address In computer programming, a partial computer address that uses the base address of the computer program, in which it appears, as the ellipsed component of…
self-synchronizing code A code in which the symbol stream formed by a portion of one code word, or by the overlapped portion of any two adjacent code words, is not a valid code…
self-testing circuit A circuit that uses the data it is retransmitting to perform tests on itself to ensure that it is transmitting properly, i.e.
semi-permanent connection A connection established via a service order or via network management. [T1.627-1993]
semiautomated tactical command and control system A machine-aided command and control system in which human intervention is required in varying degrees to operate the system.
semiautomatic switching system In telephone systems, a switching system in which telephone operators receive call instructions orally from users and complete them by automatic equipment.
semiconductor laser Synonym injection laser diode.
semiduplex operation A method which is simplex operation at one end of the circuit and duplex operation at the other.
send loudness rating (SLR) See sending loudness rating. [T1.508-1998]
sender A device that accepts address information from a register or routing information from a translator, and then transmits the proper routing information to a…