Back Up Next ISO/IEC 27011 ISO/IEC 27011:2024 / ITU-T X.1051 — Information security, cybersecurity and privacy protection — Information security controls based on ISO/IEC 27002 for telecommunications organizations (third edition) Up Abstract “The scope of this Recommendation | International Standard is to provide guidelines supporting the implementation of information security controls in telecommunications organizations. The adoption of this Recommendation | International Standard will allow telecommunications organizations to meet baseline information security management requirements of confidentiality, integrity, availability and any other relevant information security property.” [Source: ISO/IEC 27011:2024/ITU-T X.1051] Introduction This I nformation S ecurity M anagement S ystem implementation guide for the telecoms industry was developed jointly by ITU-T and ISO/IEC JTC 1/SC 27, with the identical text being dual-numbered as both ISO/IEC 27011 and ITU-T X.1051 . Scope ISO/IEC 27011 guides telecoms organisations on the information security controls worth considering and adopting to mitigate their unacceptable information risks. As with ISO/IEC 27002 , the controls are discretionary, not mandatory. Telecoms organisations are free to determine whether the controls are or are not applicable ("necessary") according to their information risks, and they may prefer custom versions, bespoke controls or controls suggested by other sources. Ideally, they would do so using an I nformation S ecurity M anagement S ystem modeled on ISO/IEC 27001 , managing and overseeing the controls and risks systematically. Structure Aside from minor variations/explanations to a few of the ISO/IEC 27002 controls, the ‘extended control set’ suggests 14 additional information security controls specifically for telecoms organisations. Main clauses: 4: Overview 5: Organizational controls - with 8 supplementary controls 6: People controls - with no supplementary controls 7: Physical controls - with 5 supplementary controls 8: Technological controls - - with 1 supplementary control For example, control 5.42 TEL - Non-disclosure of communications indicates that telecoms organisations should, if appropriate, secure metadata relating to the messages they handle for customers, as well as the messages themselves, unless they are legally obliged to disclose. Status The first edition was published in 2008 . The second edition was published in 2016 with minor corrigendum (correction) in 2018. Having been updated and substantially restructured to align with the 2022 version of ISO/IEC 27002 , the current third edition was published in 2024 . Commentary It is good to see continued productive collaboration between these well-respected international standards bodies, despite the challenge and delays caused by batting the draft standard back and forth between their formal processes like a tennis ball at a Wimbledon final. Up Up Up This page last updated: 19 August 2026

Back Up Next ISO/IEC 27006-1 ISO/IEC 27006-1:2024 — Information technology, cybersecurity and privacy protection — Requirements for bodies providing audit and certification of information security management systems — Part 1: General (fourth edition) Up Abstract ISO/IEC 27006 part 1 "specifies requirements and provides guidance for bodies providing audit and certification of an information security management system (ISMS), in addition to the requirements contained within ISO/IEC 17021-1. The requirements contained in [ISO/IEC 27006-1] are demonstrated in terms of competence and reliability by bodies providing ISMS certification. The guidance contained in [ISO/IEC 27006-1] provides additional interpretation of these requirements for bodies providing ISMS certification. NOTE [ISO/IEC 27006-1] can be used as a criteria document for accreditation, peer assessment or other audit processes.” [Source: ISO/IEC 27006-1:2024] Introduction ISO/IEC 27006-1 is the accreditation standard that guides C ertification B odies on the formal processes they must follow when auditing their clients’ I nformation S ecurity M anagement S ystems against ISO/IEC 27001 in order to certify or register them. The accreditation processes laid out in the standard give assurance that ISO/IEC 27001 certificates issued by accredited CBs are valid, consistent and meaningful. ISO/IEC 27006-1 specifies requirements and provides guidance for conformity auditing specifically in the context of ISMSs, in addition to the general accreditation requirements laid down by ISO/IEC 17021-1 and ISO 19011 . The conformity assessment/certification process involves auditing the information security management system for conformity with ISO/IEC 27001 . The standard provides guidance specific to ISMS certifications where applicable - for example, in order to remain independent and objective, the CB cannot also provide information security reviews or internal audits of the client’s ISMS. [Since no exclusion period is specified in the standard, this could be interpreted as a permanent or indefinite exclusion, or it may mean contemporaneously or within a few months or ... whatever.] Scope The scope is to “specify requirements and provide guidance for bodies providing audit and certification of an information security management system (ISMS), in addition to the requirements contained within ISO/IEC 17021 and ISO/IEC 27001 . It is primarily intended to support the accreditation of certification bodies providing ISMS certification.” Any duly-accredited CB providing ISO/IEC 27001 conformity certificates must fulfill the requirements in ISO/IEC 27006-1 plus ISO/IEC 17021-1 and ISO 19011 in terms of their competence, suitability and reliability to perform their work properly. This is necessary to ensure that issued ISO/IEC 27001 certificates are meaningful, and truly indicate that the organisation has fully satisfied the stated requirements. Since literally anyone can issue certificates without necessarily following the certification processes specified in this standard, even substantially non-conformant organisations could conceivably purchase their ISMS certificates or simply ‘self-certify’ (assert rather than demonstrate conformity), potentially discrediting the whole certification structure. In other words, accreditation is an important control for certification. Structure The standard follows the structure of ISO/IEC 17021-1 clause-by-clause: 4: Principles 5: General requirements 6: Structural requirements 7: Resource requirements 8: Information requirements 9: Process requirements 10: Management system requirements Annex A: Knowledge and skills for ISMS auditing and certification Annex B: Further competence considerations Annex C: Audit time - putting sufficient effort into the conformity assessment Annex D: Methods for audit time calculations - determining how much effort is 'sufficient' Annex E: Guidance for review of implemented ISO/IEC 27001:2022, Annex A controls Status The first edition of ISO/IEC 27006 was published in 2007 . The second edition was published in 2011 . The third edition was substantially revised and published in 2015 , with minor wording changes as an amendment in 2020. The fourth edition was published as ISO/IEC 27006-1 in 2024 . It builds upon two normative references - ISO/IEC 17021-1:2015 and ISO/IEC 27001:2022 . Meanwhile, SC 27 is working on the structure of ISO/IEC 27006-1 and other issues, including concerns raised but not entirely resolved in exchanges with CASCO . See also ISO/IEC 27007 for further guidance on auditing an ISMS plus ISO/IEC TS 27008 for guidance on auditing information security controls. [Note: ISO/IEC 27006-2 was published in 2021 covering PIMS certification against ISO/IEC 27701 but was renumbered in 2025, becoming ISO/IEC 27706 .] Commentary Certification auditors have limited interest in the organisation’s information risks and information security controls that are supposedly being managed through the ISMS, needing to confirm "whether controls are implemented and effective and meet their stated information security objectives". It is largely assumed that any organisation with an operational ISMS in conformity with the standard is, in fact, determining its objectives and managing its information risks diligently. ISO/IEC 27001 gives organisations latitude on how they design and document their ISMS, and hence certification auditors cannot simply follow a straightforward conformity checklist: they need to understand both management systems and information risk and security concepts. As far as I’m concerned, that’s a good thing! The requirement to specify the S tatement o f A pplicability on ISO/IEC 27001 conformity certificates has the unfortunate side-effect of impeding maintenance updates to an ISMS if that would affect the SoA e.g. responding to newly-identified information risks or to incorporate additional controls. Since that hampers a fundamental principle or purpose of having a management system, it may constitute a substantive defect in ISO/IEC 27006-1 ... and perhaps other ISO management system standards too. In practice, however, it appears nobody (except me?) has noticed and is bothered by this. Up Up Up This page last updated: 19 August 2026

Back Up Next ISO/IEC 27036-1 ISO/IEC 27036-1:2021 — Cybersecurity — Supplier relationships — Part 1: Overview and concepts (second edition) Up Abstract ISO/IEC 27036 part 1 “is an introductory part of ISO/IEC 27036. It provides an overview of the guidance intended to assist organizations in securing their information and information systems within the context of supplier relationships. It also introduces concepts that are described in detail in the other parts of ISO/IEC 27036. [ISO/IEC 27036] addresses perspectives of both acquirers and suppliers.” [ ISO/IEC 27036-1:2021 ] Introduction ISO/IEC 27036 is a multi-part standard offering guidance on the management of information risks involved in the acquisition of IT products (goods and services) from suppliers. The standards avoid referring to selling and buying since the issues are much the same whether the transactions are commercial or not e.g . when one part of an organisation or group acquires IT products from another, or uses free/open-source products. Scope Part 1 introduces all parts of this standard, providing general background information such as the key terms and concepts around information security in supplier relationships, including “any supplier relationship that can have information security implications, e.g. information technology, healthcare services, janitorial services, consulting services, R&D partnerships, outsourced applications (ASPs), or cloud computing services (such as software, platform, or infrastructure as a service). ” Structure Main clauses: 5: Problem definition and key concepts 6: Overall ISO/IEC 27036 structure and overview Status The first edition of part 1 was published and made available for free in 2014. The current second edition was published initially for free in 2021 but no longer, unfortunately. Commentary Part 1 outlines a number of information risks commonly arising from or relating to business relationships between acquirers and suppliers, where goods/services acquired have an information content or information security relevance, or where the supplier gains access to the acquirer’s internal information. [The converse situation - i.e. acquirers gaining access to suppliers’ internal information - is not explicitly mentioned in part 1 but is noted in part 2 .] The standard primarily takes the perspective of the acquirer, covering the acquirer’s information security concerns that ought to be addressed in relationships with upstream suppliers. [The supplier’s information risks when supplying downstream customers, or in relationships with partners, are not explicitly covered e.g . disclosure and theft of sensitive intellectual property.] Within the ISO27k information security standards , the products most obviously covered by ISO/IEC 27036 include: IT outsourcing and cloud computing services; Other professional services e.g. legal, accounting/tax and HR services, security guards, cleaners, delivery services (couriers), equipment maintenance/servicing, consulting and specialist advisory services, knowledge management, research and development, manufacturing, logistics, source code escrow and healthcare; Provision of ICT hardware, software and services including telecommunications and Internet services; Bespoke products and services where the acquirer specifies the requirements and may play an active role in the product design and development (as opposed to commodities and standard off-the-shelf products); Electricity to power ICT equipment. The ISO/IEC 27036 standards therefore could cover: Strategic goals, objectives, business needs and compliance obligations in relation to information security, privacy and assurance when acquiring ICT-related or information products; Information risks such as: Acquirer’s reliance on providers, complicating the acquirer’s business continuity arrangements (both resilience and recovery); Physical and logical access to and protection of second and third party information assets; Creating an ‘extended trust’ environment with shared responsibilities for information security, or conversely applying the ‘zero trust’ approach in this context; Creating a shared responsibility for conformity with information security policies, standards, laws, regulations, contracts and other commitments/obligations; Coordination between supplier and acquirer to adapt or respond to new/changed information security requirements; ... and more. Information security controls such as: Preliminary analysis, preparation of a sound business case, Invitation To Tender etc ., taking into account the risks, controls, costs and benefits associated with maintaining adequate information security; Creation of explicit shared strategic goals to align acquirer and provider on information security and other aspects (e.g. a jointly-owned ‘relationship strategy’); Specification of important information security requirements (such as requiring that suppliers are ISO/IEC 27001 certified and/or use standards such as ISO27k ) in contracts, Service Level Agreements etc .; Security management procedures, including those that may be jointly developed and operated such as risk analysis, security design, identity and access management, incident management and business continuity; Special controls to cater for unique risks (such as testing and fallback arrangements associated with the transition/implementation stage when an outsourcing supplier first provides services); Clear ownership, accountability and responsibility for the protection of valuable information assets, including security logs, audit records and forensic evidence; A ‘right of audit’ and other compliance/assurance controls, with penalties or liabilities in case of identified non-compliance, or bonuses for full compliance; ... and more. The entire relationship lifecycle: Initiation - scoping, business case/cost-benefit analysis, comparison of insource versus outsource options as well as variant or hybrid approaches such as co-sourcing; Definition of requirements including the information security requirements, of course; Procurement including evaluating, selecting and contracting with supplier/s; Transition to or implementation of the supply arrangements, with enhanced risks around the implementation period; Operation including aspects such as routine relationship management, compliance, incident and change management, monitoring etc .; Refresh - an optional stage to renew the contract, perhaps reviewing the terms and conditions, performance, issues, working processes etc. ; Termination and exit i.e. ending a business relationship that has run its course in a controlled manner, perhaps leading back to the start. Some - but not all - of this is covered by ISO/IEC 27036, potentially leaving gaps to be filled by other standards plus corporate strategies, policies and procedures. Up Up Up This page last updated: 19 August 2026

Back Up Next ISO/IEC 27019 ISO/IEC 27019:2024 — Information security, cybersecurity and privacy protection — Information security controls for the energy utility industry (second edition) Up Abstract ISO/IEC 27019 "provides information security controls for the energy utility industry, based on ISO/IEC 27002:2022, for controlling and monitoring the production or generation, transmission, storage and distribution of electric power, gas, oil and heat, and for the control of associated supporting processes. This includes in particular the following: central and distributed process control, monitoring and automation technology as well as information systems used for their operation, such as programming and parameterization devices; digital controllers and automation components such as control and field devices or programmable logic controllers (PLCs), including digital sensor and actuator elements; all further supporting information systems used in the process control domain, e.g. for supplementary data visualization tasks and for controlling, monitoring, data archiving, historian logging, reporting and documentation purposes; communication technology used in the process control domain, e.g. networks, telemetry, telecontrol applications and remote-control technology; Advanced metering infrastructure (AMI) components, e.g. smart meters; measurement devices, e.g. for emission values; digital protection and safety systems, e.g. protection relays, safety PLCs, emergency governor mechanisms; energy management systems, e.g. for distributed energy resources (DER), electric charging infrastructures, and for private households, residential buildings or industrial customer installations; distributed components of smart grid environments, e.g. in energy grids, in private households, residential buildings or industrial customer installations; all software, firmware and applications installed on above-mentioned systems, e.g. distribution management system (DMS) applications or outage management systems (OMS); any premises housing the abovementioned equipment and systems; remote maintenance systems for abovementioned systems.” [Source: ISO/IEC 27019:2024] Introduction This standard is intended to help organisations in “the energy utility industry” (such as conventional/non-nuclear electricity generators, plus suppliers of gas, oil and heating) to interpret and apply ISO/IEC 27002 in order to secure their industrial process control systems i.e. their O perational T echnology as opposed to I nformation T echnology. Scope Information security management presents fundamentally the same risk management challenges in all contexts, but the real-time nature of process control systems plus their associated safety and environmental criticality make some aspects particularly challenging for energy utilities. The standard therefore provides additional, more specific guidance on information security controls than the generic advice provided by ISO/IEC 27002 , tailored to the specific context of process control systems used by energy utilities for controlling and monitoring the production or generation, transmission, storage and distribution of electric power, gas, oil and heat, and for the control of associated supporting processes. Note: given their unique and extreme risks, the scope of ISO/IEC 27019 explicitly excludes process control in nuclear facilities. See instead (for example) IEC 63096:2020 “Nuclear power plants - Instrumentation, control and electrical power systems - Security controls” . Structure ISO/IEC 27019 complements and must be read in conjunction with ISO/IEC 27002:2022 since it does not incorporate the content of ISO/IEC 27002. A dozen additional controls are offered for the energy sector. Main clauses: 5: Organizational controls - with 2 supplementary controls 6: People controls 7: Physical controls - 4 supplementary controls 8: Technological controls - 6 supplementary controls Annex A: Energy utility industry specific controls reference Annex B: Correspondence between this document and the first edition (ISO/IEC 27019:2017) The standard notes in clause 0.4: “In addition to the controls provided by a comprehensive information security management system, [ISO/IEC 27019] provides additional assistance and sector-specific measures for the process control systems used by the energy utility sector, taking into consideration the special requirements in these environments. If necessary, further controls can be developed to fulfil particular requirements. The selection of controls depends upon the decisions taken by the organization on the basis of its own risk acceptance criteria, the options for dealing with the risk and the general risk management approach of the organization. NOTE National and international law, legal ordinances and regulations can apply.” Other ISO27k standards are also recommended to fill-in the broader context e.g. ISO/IEC 27001 for an overarching I nformation S ecurity M anagement S ystem that encompasses process control/OT as well as general commercial systems, networks and processes, plus ISO/IEC 27005 concerning the management of information risk. Status A preliminary edition was published as a T echnical R eport in 2013 by fast-tracking the German standard DIN SPEC 27009:2012-04 based on ISO/IEC 27002:2005. The first International Standard was published in 2017, based on ISO/IEC 27001:2013 and ISO/IEC 27002:2013, plus IEC TC 57 standards, IEC TC 65 standards (IEC 62443-2-1) and IEC SC45A standards (IEC 62645). A corrigendum to replace a stray “should” with a “shall” in the annex was published to critical acclaim in 2019. Hurrah! Crisis averted! The corrected standard was confirmed unchanged in 2022 ... but then was revised anyway to reflect the themed restructure and controls resequence of ISO/IEC 27002:2022 adding 12 suggested “ENR” controls to ISO/IEC 27022’s 96. The current second edition was published in 2024 . Commentary The global energy industry has long had a strong safety culture since the devastating physical impacts caused by explosions, oil and chemical spills, radioactive releases etc. are painfully apparent (Bhopal , Three Mile Island , Chernobyl , Exxon Valdiz , Deepwater Horizon , Fukoshima ... need we say more?). The industry also has a strong awareness of its environmental obligations both in terms of its own operations, the upstream primary industries (e.g. mining) and the downstream impacts of some of its products. F Furthermore, the industry has a strong culture of physical and information security due to the substantial risks arising from: Threats such as natural disasters and deliberate attacks (sabotage) from hackers, A dvanced P ersistent T hreats, spies and spooks, terrorists, insiders, pressure groups and foreign states, as well as more mundane threats from accidents, competitors, electromechanical failures, malware/ransomware, social engineers etc .; Vulnerabilities inherent in their systems and processes. Process control systems that are (in some manner) connected to, exposed to or accessible from the Internet and other networks are vulnerable to a panopoly of cyber-threats, including those resulting from design flaws and bugs in software especially if they are not well designed, managed and maintained (e.g . security patching is distinctly challenging on safety-critical systems, given the need for assurance that patches do not harm safety); and Impacts , particularly limited availability and/or integrity of business- or safety-critical information leading to supply interruptions (power cuts), out-of-specification supplies (e.g . over/under-voltage supplies), safety incidents (e.g . the catastrophic release of vast amounts of energy) and environmental incidents (e.g. oil/gas/chemical leaks). Energy utilities, both public and private, are generally classed as part of the critical national infrastructures (e.g. under NIS 2 in Europe) due to their obvious strategic significance. With an extremely high level of automation, the energy industry relies heavily on OT, principally electronic process control systems such as P rogrammable L ogic C ontrollers, I ndustrial I nternet o f T hings, I ndustrial C ontrol S ystems and S upervisory C ontrol A nd D ata A cquisition, plus the associated networks and procedures, to monitor, direct and control its production activities in real time. Most of the safety-related operations, for example, in a modern plant depend heavily on networked computer systems with electronic monitoring and electrically-operated valves, switches and actuators, while manually-operated controls are often limited to specific backup or emergency override functions. Many of the monitored and controlled systems are located in physically stressful locations subject to extreme heat, pressure, corrosion and/or vibration, and some are distributed remotely, sometimes very remotely, making physical access, monitoring and access control challenging and costly. In short, the industry cannot function normally and safely without its electronic process control systems and networks, while serious, widespread or extended incidents cause severe national if not international repercussions. Up Up Up This page last updated: 19 August 2026

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