The ISO/IEC 27000-series (also known as the 'ISMS Family of Standards' or 'ISO27k' for short) comprises information security standards published jointly by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC).
The series provides best practice recommendations on information security management, risks and controls within the context of an overall information security management system (ISMS), similar in design to management systems for quality assurance (the ISO 9000 series) and environmental protection (the ISO 14000 series).
The series is deliberately broad in scope, covering more than just privacy, confidentiality and IT or technical security issues. It is applicable to organizations of all shapes and sizes. All organizations are encouraged to assess their information security risks, then implement appropriate information security controls according to their needs, using the guidance and suggestions where relevant. Given the dynamic nature of information security, the ISMS concept incorporates continuous feedback and improvement activities, summarized by Deming's "plan-do-check-act" approach, that seek to address changes in the threats, vulnerabilities or impacts of information security incidents.
The original ISO/IEC standards are sold directly by ISO, while sales outlets associated with various national standards bodies also sell various versions including local translations.
Many people, and many organisations, have contributed to the development of standards in the ISO27k series. The first standard in this series was ISO/IEC 17799:2000; this was a fast-tracking of the existing British standard BS 7799 part 1:1999 The initial release of BS 7799 was based, in part, on an information security policy manual developed by the Royal Dutch/Shell Group in the late 1980s and early 1990s. In 1993, the Department of Trade and Industry (United Kingdom) convened a team to review existing practice in information security, with the goal of producing a standards document. In 1995, the BSI Group published the first version of BS 7799. One of the principal authors of BS 7999 recalls that, at the beginning of 1993, “The DTI decided to quickly assemble a group of industry representatives from seven different sectors: Shell ([David Lacey] and Les Riley), BOC Group (Neil Twist), BT (Dennis Willets), Marks & Spencer (Steve Jones), Midland Bank (Richard Hackworth), Nationwide (John Bowles) and Unilever (Rolf Moulton).”. David Lacey credits Donn B. Parker as having the "original idea of establishing a set of information security controls", and with producing a document containing a "collection of around a hundred baseline controls" by the late 1980s for "the I-4 Information Security circle which he conceived and founded."
The published standards related to "information technology - security techniques" are:
- ISO/IEC 27000 — Information security management systems — Overview and vocabulary
- ISO/IEC 27001 — Information technology - Security Techniques - Information security management systems — Requirements. The older ISO/IEC 27001:2005 standard relied on the Plan-Do-Check-Act cycle; the newer ISO/IEC 27001:2013 does not, but has been updated in other ways to reflect changes in technologies and in how organizations manage information.
- ISO/IEC 27002 — Code of practice for information security management
- ISO/IEC 27003 — Information security management system implementation guidance
- ISO/IEC 27004 — Information security management — Measurement
- ISO/IEC 27005 — Information security risk management
- ISO/IEC 27006 — Requirements for bodies providing audit and certification of information security management systems
- ISO/IEC 27007 — Guidelines for information security management systems auditing (focused on the management system)
- ISO/IEC TR 27008 — Guidance for auditors on ISMS controls (focused on the information security controls)
- ISO/IEC 27010 — Information security management for inter-sector and inter-organizational communications
- ISO/IEC 27011 — Information security management guidelines for telecommunications organizations based on ISO/IEC 27002
- ISO/IEC 27013 — Guideline on the integrated implementation of ISO/IEC 27001 and ISO/IEC 20000-1
- ISO/IEC 27014 — Information security governance. Mahncke assessed this standard in the context of Australian e-health.
- ISO/IEC TR 27015 — Information security management guidelines for financial services
- ISO/IEC 27017 — Code of practice for information security controls based on ISO/IEC 27002 for cloud services
- ISO/IEC 27018 — Code of practice for protection of personally identifiable information (PII) in public clouds acting as PII processors
- ISO/IEC 27031 — Guidelines for information and communication technology readiness for business continuity
- ISO/IEC 27032 — Guideline for cybersecurity
- ISO/IEC 27033-1 — Network security - Part 1: Overview and concepts
- ISO/IEC 27033-2 — Network security - Part 2: Guidelines for the design and implementation of network security
- ISO/IEC 27033-3 — Network security - Part 3: Reference networking scenarios - Threats, design techniques and control issues
- ISO/IEC 27033-5 — Network security - Part 5: Securing communications across networks using Virtual Private Networks (VPNs)
- ISO/IEC 27034-1 — Application security - Part 1: Guideline for application security
- ISO/IEC 27035 — Information security incident management
- ISO/IEC 27036-3 — Information security for supplier relationships - Part 3: Guidelines for information and communication technology supply chain security
- ISO/IEC 27037 — Guidelines for identification, collection, acquisition and preservation of digital evidence
- ISO 27799 — Information security management in health using ISO/IEC 27002. The purpose of ISO 27799 is to provide guidance to health organizations and other holders of personal health information on how to protect such information via implementation of ISO/IEC 27002.
- ISO/IEC 27019 — Information security management guidelines based on ISO/IEC 27002 for process control systems specific to the energy utility industry
- ISO/IEC 27033 — IT network security, a multi-part standard based on ISO/IEC 18028:2006 (parts 1-3 are published already)
- ISO/IEC 27036 — Guidelines for security in supplier relationships
- ISO/IEC 27038 — Specification for redaction of digital documents
- ISO/IEC 27039 — Intrusion detection and protection systems
- ISO/IEC 27040 — Guideline on storage security
- ISO/IEC 27041 — Assurance for digital evidence investigation methods
- ISO/IEC 27042 — Analysis and interpretation of digital evidence
- ISO/IEC 27043 — Digital evidence investigation principles and processes
- ISO/IEC JTC 1/SC 27 - IT Security techniques
- BS 7799, the original British Standard from which ISO/IEC 17799, ISO/IEC 27002 and ISO/IEC 27001 were derived
- Document management system
- Sarbanes–Oxley Act
- Standard of Good Practice published by the Information Security Forum
- ISO Freely Available Standards - see ISO/IEC 27000:2014
- "ISO27k timeline". ISO27001security.com. IsecT Ltd. Retrieved 1 April 2016.
- Jake Kouns, Daniel Minoli (2011). Information Technology Risk Management in Enterprise Environments : a Review of Industry Practices and a Practical Guide to Risk Management Teams. Somerset: Wiley.
- "David Lacey on the Origins of ISO27k". Tripwire.com. 18 October 2013.
- ISO/IEC 27014
- Mahncke, R. J. (2013). The Applicability of ISO/IEC27014:2013 For Use Within General Medical Practice. 
- "ISO/IEC 27040". ISO Standards Catalogue. ISO. Retrieved 2014-06-15.