A better understanding

Safety versus Security
The author

Stéphane POTIER
Technology Marketing Manager
B&R Automation
stephane.potier@br-automation.com

Perfection in A...
Safety
Definition
Safety is freedom from unacceptable risk of physical injury or of
damage to the health of people, either...
Dependability
Definition
Dependability of a system is the ability to deliver service that can
justifiably be trusted.
Depe...
Security
Definition
Security is the prevention of illegal or unwanted penetration,
intentional or unintentional interferen...
Dependability & Security attributes
Definition
• Availability - readiness for correct service (usually expressed as a
perc...
Dependability attributes
Relationship

Availability
Reliability
Safety
Dependability
Confidentiality

Integrity
Maintainab...
Security attributes
Relationship

Availability
Reliability
Safety
Security
Confidentiality

Integrity
Maintainability
Functional Safety
Definition
Functional safety is part of the overall safety that depends on a
system or equipment operati...
Translation
French
•
•
•
•
•
•
•

Dependability = Sûreté de fonctionnement
Reliability = Fiabilité
Availability = Disponib...
Translation
German
•
•
•
•
•
•
•

Dependability = Verlässlichkeit
Reliability = Zuverlässigkeit
Availability = Verfügbarke...
References
[1] http://en.wikipedia.org/wiki/Dependability
[2] http://www.iec.ch/functionalsafety
[3] IEC/TS 62443-1-1 Indu...
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Safety versus security

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Safety versus Security, concepts and terminology. Definition of dependability and its attributes, including German and French translations.

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Safety versus security

  1. 1. A better understanding Safety versus Security
  2. 2. The author Stéphane POTIER Technology Marketing Manager B&R Automation stephane.potier@br-automation.com Perfection in Automation www.br-automation.com
  3. 3. Safety Definition Safety is freedom from unacceptable risk of physical injury or of damage to the health of people, either directly, or indirectly as a result of damage to property or to the environment. Safety is an attribute of Dependability.
  4. 4. Dependability Definition Dependability of a system is the ability to deliver service that can justifiably be trusted. Dependability is a measure of a system's availability, reliability, safety, integrity and its maintainabilty
  5. 5. Security Definition Security is the prevention of illegal or unwanted penetration, intentional or unintentional interference with the proper and intended operation, or inappropriate access to confidential information in industrial automation and control systems. Security is a composite of availability, confidentiality and integrity.
  6. 6. Dependability & Security attributes Definition • Availability - readiness for correct service (usually expressed as a percentage of uptime in a given year) • Reliability - continuity of correct service (typically expressed as a probability of failure-free system operation over a specified time) • Safety - absence of catastrophic consequences or severe injuries on the users and the environment • Confidentiality: absence of unauthorized disclosure of information • Integrity - absence of improper system alteration • Maintainability - ability for a process to undergo modifications and repairs
  7. 7. Dependability attributes Relationship Availability Reliability Safety Dependability Confidentiality Integrity Maintainability
  8. 8. Security attributes Relationship Availability Reliability Safety Security Confidentiality Integrity Maintainability
  9. 9. Functional Safety Definition Functional safety is part of the overall safety that depends on a system or equipment operating correctly in response to its inputs. including the safe management of likely operator errors, hardware failures and environmental changes. IEC 61508 is intended to be a basic functional safety standard applicable to all kinds of industry.
  10. 10. Translation French • • • • • • • Dependability = Sûreté de fonctionnement Reliability = Fiabilité Availability = Disponibilité Maintainability = Maintenabilité Safety = Sécurité/Sûreté (1) Security = Sécurité (1) Integrity = Intégrité (1) The French word « Sécurité » is used to translate both « Safety » and « Security ». In some industries, the word « Sûreté » is used to translate « Safety ».
  11. 11. Translation German • • • • • • • Dependability = Verlässlichkeit Reliability = Zuverlässigkeit Availability = Verfügbarkeit Maintainability = Instandhaltbarkeit Safety = Sicherheit (2) Security= Sicherheit (2) Integrity = Integrität (2) The German word « Sicherheit » is used to translate both « Safety » and « Security ». For this reason the English terms are usually preferred.
  12. 12. References [1] http://en.wikipedia.org/wiki/Dependability [2] http://www.iec.ch/functionalsafety [3] IEC/TS 62443-1-1 Industrial communication networks – Network and system security – Part 1-1: Terminology, concepts and models [4] A. Avizienis, J.-C. Laprie and B. Randell: Fundamental Concepts of Dependability. Research Report No 1145, LAAS-CNRS, April 2001 [5] http://www.open-safety.org
  13. 13. YOUR GLOBAL PARTNER FOR AUTOMATION EXCELLENCE
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