Sensors and Actuators

Sensors and Actuators

Definition(s)


Sensors and Actuators

Measuring or actuating elements connected to process equipment and to the control system.

Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Zone

Security Zone

Definition(s)


Security Zone

Grouping of logical or physical assets that share common security requirements.
  • NOTE: All unqualified uses of the word “zone” in this standard should be assumed to refer to a security zone.
  • NOTE: A zone has a clear border with other zones. The security policy of a zone is typically enforced by a combination of mechanisms both at the zone edge and within the zone. Zones can be hierarchical in the sense that they can be comprised of a collection of subzones
.Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Violation

Security Violation

Definition(s)


Security Violation

Act or event that disobeys or otherwise breaches security policy through an intrusion or the actions of a well-meaning insider.

Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Services

Security Services

Definition(s)


Security Services

Mechanisms used to provide confidentiality, data integrity, authentication, or no repudiation of information [11]. Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Program

Security Program

Definition(s)


Security Program

A combination of all aspects of managing security, ranging from the definition and communication of policies through implementation of best industry practices and ongoing operation and auditing.

Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Procedures

Security Procedures

Definition(s)


Security Procedures

Definitions of exactly how practices are implemented and executed.
  • NOTE: Security procedures are implemented through personnel training and actions using currently available and installed technology.
Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Performance

Security Performance

Definition(s)


Security Performance

Program’s compliance, completeness of measures to provide specific threat protection, post-compromise analysis, review of changing business requirements, new threat and vulnerability information, and periodic audit of control systems to ensure security measures remain effective and appropriate.
  • NOTE: Tests, audits, tools, measures, or other methods are required to evaluate security practice performance
Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Perimeter

Security Perimeter

Definition(s)


Security Perimeter

Boundary (logical or physical) of the domain in which a security policy or security architecture applies, i.e., the boundary of the space in which security services protect system resources [11]. Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Objective

Security Objective

Definition(s)


Security Objective

Aspect of security which to achieve is the purpose and objective of using certain mitigation measures, such as confidentiality, integrity, availability, user authenticity, access authorization, accountability.

Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Level

Security Level

Definition(s)


Security Level

Level corresponding to the required effectiveness of countermeasures and inherent security properties of devices and systems for a zone or conduit based on assessment of risk for the zone or conduit [13]. Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Intrusion

Security Intrusion

Definition(s)


Security Intrusion

Security event, or a combination of multiple security events, that constitutes a security incident in which an intruder gains, or attempts to gain, access to a system (or system resource) without having authorization to do so [11]. Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Function

Security Function

Definition(s)


Security Function

Function of a zone or conduit to prevent unauthorized electronic intervention that can impact or influence the normal functioning of devices and systems within the zone or conduit.

Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Event

Security Event

Definition(s)


Security Event

Occurrence in a system that is relevant to the security of the system [11]. Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Control

Security Control

Definition(s)


Security Control

See “countermeasure.Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Components

Security Components

Definition(s)


Security Components

Assets such as firewalls, authentication modules, or encryption software used to improve the security performance of an industrial automation and control system (See “countermeasure”). Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Audit

Security Audit

Definition(s)


Security Audit

Independent review and examination of a system's records and activities to determine the adequacy of system controls, ensure compliance with established security policy and procedures, detect breaches in security services, and recommend any changes that are indicated for countermeasures [7]. Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security Architecture

Security Architecture

Definition(s)


Security Architecture

Plan and set of principles that describe the security services that a system is required to provide to meet the needs of its users, the system elements required to implement the services, and the performance levels required in the elements to deal with the threat environment [11].
  • NOTE: In this context, security architecture would be an architecture to protect the control network from intentional or unintentional security events.
Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Security

Security

Definition(s)


Security

  1. measures taken to protect a system.
  2. condition of a system that results from the establishment and maintenance of measures to protect the system.
  3. condition of system resources being free from unauthorized access and from unauthorized or accidental change, destruction, or loss [11].
  4. capability of a computer-based system to provide adequate confidence that unauthorized persons and systems can neither modify the software and its data nor gain access to the system functions, and yet to ensure that this is not denied to authorized persons and systems [14].
  5. prevention of illegal or unwanted penetration of or interference with the proper and intended operation of an industrial automation and control system.
  • NOTE: Measures can be controls related to physical security (controlling physical access to computing assets) or logical security (capability to login to a given system and application.)
Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Secret

Secret

Definition(s)


Secret

Condition of information being protected from being known by any system entities except those intended to know it [11]. Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Safety Network

Safety Network

Definition(s)


Safety Network

Network that connects safety-instrumented systems for the communication of safety-related information.

Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Striking Distance

Striking Distance

Definition(s)


Striking Distance

The distance over which the final breakdown of the initial lightning stroke occurs.

Source: API RP 545 Recommended Practice for Lightning Protection of Aboveground Storage Tanks for Flammable or Combustible Liquids, First Edition, October 2009. Global Standards
Shunt

Shunt

Definition(s)


Shunt

A short conductor that is electrically connected to the tank floating roof and contacts the tank shell.

Source: API RP 545 Recommended Practice for Lightning Protection of Aboveground Storage Tanks for Flammable or Combustible Liquids, First Edition, October 2009. Global Standards
Spot

Spot

Definition(s)


Spot

Means random examination to the discretion of the surveyor/inspector.

Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards
Secondary Structure

Secondary Structure

Definition(s)


Secondary Structure

Components that are not considered “load carrying” for the purposes of the design calculations. Secondary structures can include, but are not limited to, the following components: — doors, wall, and roof panels; — panel stiffeners and corrugations;

— internal securing points.

Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards
SST

SST

Definition(s)


SST

Stainless steel. Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards

SST

[austenitic] stainless steel. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards
SMAW

SMAW

Definition(s)


SMAW

Shielded metal arc welding. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards
SCWI

SCWI

Definition(s)


SCWI

Senior certified welding inspector. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards
STF

STF

Definition(s)


STF

Stress transfer function(also known as a load to stress curve). Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global Standards
Structural Capacity

Structural Capacity

Definition(s)


Structural Capacity

Maximum load(s) the connector can sustain without exceeding the allowables for normal, extreme, or survival conditions and still maintain functional requirements.

Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global Standards
Su0

Su0

Definition(s)


Su0

Undrained shear strength at the lowest depth of the maximum plan area of spudcan.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards