The ISO/IEC 27001
The ISO/IEC 27001 sets information security management requirements, strengthening confidentiality and availability whereby organisations must implement risk controls, resilience, and supplier security on an ongoing basis.
What is The ISO/IEC 27001?
Definition and purpose
ISO/IEC 27001 is an international standard that defines requirements for establishing, implementing, maintaining, and continually improving an Information Security Management System (ISMS). Its purpose is to provide a structured, risk-based framework for protecting information assets by ensuring their confidentiality, integrity, and availability, regardless of the organisation’s size or sector.
Scope of application
ISO/IEC 27001 is applicable to any organisation that processes, stores, or manages information, including financial institutions, technology providers, professional services firms, and regulated entities. The standard is deliberately flexible and sector-agnostic, allowing organisations to define the scope of their ISMS based on their business context, risk profile, and regulatory environment, while remaining accountable for the protection of in-scope information assets.
Core requirements and approach
The standard requires organisations to identify information security risks, assess their potential impact, and implement proportionate controls to mitigate those risks. This includes governance and leadership accountability, documented policies and procedures, asset management, access control, supplier and third-party risk management, incident response, and business continuity considerations. ISO/IEC 27001 emphasises continuous improvement, requiring regular monitoring, internal audits, management reviews, and corrective actions rather than one-time implementation.
Why it matters
ISO/IEC 27001 matters because it provides demonstrable assurance that information security is managed systematically and sustainably. Certification signals to regulators, customers, and partners that an organisation has effective controls in place to manage cyber, operational, and supplier-related risks. In regulated and high-trust environments, it functions as both a governance benchmark and a practical foundation for compliance with broader regulatory, contractual, and resilience expectations.
Who must comply & what is expected
Who must comply
ISO/IEC 27001 applies to any organisation that chooses to implement an Information Security Management System (ISMS), regardless of size, sector, or geography. While certification is voluntary, ISO/IEC 27001 is commonly adopted by financial institutions, technology providers, professional services firms, cloud and SaaS vendors, and organisations operating in regulated or high-trust environments. In many cases, compliance is driven by regulatory expectations, contractual requirements, or customer assurance needs rather than by the standard itself, making ISO/IEC 27001 a de facto requirement in sensitive or regulated markets.
What is expected
Organisations are expected to establish, implement, maintain, and continually improve an ISMS that is proportionate to their information security risks. This includes defining the ISMS scope, conducting risk assessments, selecting and implementing appropriate security controls, and embedding governance and accountability at senior management level. The standard requires documented policies, asset and access management, supplier and third-party risk controls, incident management, and business continuity considerations, all supported by evidence and ongoing oversight.
Ongoing obligations and assurance
ISO/IEC 27001 is not a one-off compliance exercise. Organisations must continuously monitor the effectiveness of controls, perform internal audits, conduct management reviews, and remediate identified weaknesses. Where certification is pursued, independent auditors assess whether controls are operating effectively and aligned with the organisation’s risk profile. As a result, ISO/IEC 27001 functions as a continuous assurance framework, requiring sustained discipline, documentation, and improvement rather than point-in-time compliance.
How software escrow maps to ISO/IEC 27001
Software escrow maps directly to supplier and outsourced development controls under ISO/IEC 27001, particularly Annex A 8.30. The standard requires organisations to retain control and accountability where software development or maintenance is outsourced, including protection of source code and intellectual property. Escrow arrangements address this requirement by contractually securing source code, build artefacts, and documentation, ensuring that the organisation is not wholly dependent on the continued operation of an external supplier to maintain or secure its information assets.
From an availability and business continuity perspective, software escrow supports ISO/IEC 27001 expectations that information and systems remain available during disruption. The standard requires organisations to consider supplier failure, service interruption, and dependency risk when designing controls. Escrow ensures that, if a supplier ceases trading or fails to meet obligations, the organisation can recover, maintain, or transition the software without unacceptable impact to operations, directly supporting the availability objective of the ISMS.
Finally, software escrow strengthens assurance, auditability, and evidence within an ISO/IEC 27001 framework. The standard places strong emphasis on documented controls, independent verification, and demonstrable effectiveness. Escrow agreements, deposit records, update schedules, and verification reports provide tangible evidence that supplier-related risks have been identified and mitigated. When verification is performed, escrow further supports audit and certification activities by demonstrating that recovery and continuity controls are technically viable, not merely documented in policy.
How ESCROWSURE make sure that you are compliant
ESCROWSURE supports compliance with ISO/IEC 27001 by embedding supplier risk, continuity, and outsourced development controls directly into its escrow services. ESCROWSURE structures escrow agreements to address Annex A requirements relating to third-party dependencies, source code protection, and availability of information assets. By contractually securing access to source code, documentation, and supporting materials, ESCROWSURE helps organisations retain control over critical software where development or maintenance is outsourced, aligning with ISO 27001 expectations for supplier governance and accountability.
In addition, ESCROWSURE enables evidence-based compliance through documented processes, verification, and audit-ready records. Regular deposit management, optional verification testing, and clearly defined release conditions provide tangible proof that continuity and recovery controls are effective and maintained over time. While ISO/IEC 27001 places accountability on the organisation itself, ESCROWSURE ensures that organisations can demonstrate through independent evidence that outsourced software risks have been identified, mitigated, and continuously monitored within their Information Security Management System.
Commencement
ISO/IEC 27001 was first published in 2005 as the international standard for Information Security Management Systems (ISMS), establishing a formal, auditable framework for managing information security risk. From its initial publication, ISO/IEC 27001 has been applicable on a voluntary, global basis, with organisations adopting it to demonstrate structured governance over confidentiality, integrity, and availability of information assets.
Update: ISO/IEC 27001:2013 revision
In 2013, ISO/IEC 27001 was substantially revised to align with the Annex SL high-level structure used across ISO management system standards. This update strengthened leadership accountability, risk-based thinking, and integration with broader organisational governance. It also updated Annex A controls to better reflect evolving cyber risks and supplier dependencies, reinforcing the role of third-party risk management within the ISMS.
Update: ISO/IEC 27001:2022 revision
The most recent update, ISO/IEC 27001:2022, was published in October 2022. This revision modernised Annex A controls by consolidating, rewording, and introducing new controls to address contemporary risks such as cloud services, outsourced development, threat intelligence, and resilience. Notably, controls such as Annex A 8.30 clarified expectations around outsourced development and supplier accountability, reflecting increased reliance on third-party technology providers.
Update: Transition period and ongoing application
A formal transition period applies for organisations certified to ISO/IEC 27001:2013, with certification bodies requiring transition to the 2022 version by 31 October 2025. After this date, certifications to the 2013 version will no longer be valid. As a result, ISO/IEC 27001 should be treated as a living standard, with organisations expected to continuously adapt their ISMS to reflect updated controls, emerging risks, and evolving regulatory and business environments.
Frequently Asked Questions
Is the agreement customizable? How much customization do you allow?
Yes, absolutely. We believe that each escrow environment is unique and requires a customized approach. ESCROWSURE’s in-house legal counsel will craft a bespoke escrow agreement tailoring the provisions to meet the needs of your specific requirements.
How does ISO/IEC 27001 relate to other standards like GDPR?
ISO/IEC 27001 and the General Data Protection Regulation (GDPR) address different but complementary objectives. ISO/IEC 27001 focuses on establishing and operating an Information Security Management System to protect information assets, while GDPR is a legal framework governing the lawful processing and protection of personal data. ISO/IEC 27001 does not guarantee GDPR compliance, but it provides a strong security and governance foundation that supports GDPR obligations such as data security, risk management, and accountability.
Is ISO/IEC 27001 only for large companies?
No. ISO/IEC 27001 is designed to be scalable and applicable to organisations of any size. Small and medium-sized enterprises, start-ups, and niche service providers can implement an ISMS proportionate to their risk profile, business model, and regulatory exposure. The standard’s risk-based approach allows smaller organisations to focus on material risks without adopting the same level of complexity as large enterprises.
Why do we need escrow for SaaS applications?
With SaaS applications, software is not accessed on a server located on the end users premises, but instead, is hosted remotely in the cloud by a hosting services provider usually paid for by the software vendor. This introduces an additional layer of risk as it adds to the supply chain dependencies.
In addition, the data generated by the application is hosted in the cloud too. This means that if the software Vendor were to stop answering the phone, both application and data could be beyond the reach of the end user immediately.
Some end users believe that a migration to a cloud service eliminates the need for an escrow arrangement.
But this is not true.
If anything, the need for escrow is greater for SaaS applications, because of the additional layer of risk which puts both the software and the data at risk if the worst should happen.
How long does certification take?
The time required to achieve ISO/IEC 27001 certification varies depending on organisational size, maturity, and existing controls. For organisations starting from limited formal security governance, certification commonly takes between six and eighteen months. This period includes defining the ISMS scope, performing risk assessments, implementing controls, conducting internal audits, and completing the external certification audit.
How long does certification last?
ISO/IEC 27001 certification is valid for a three-year certification cycle, subject to ongoing compliance. During this period, organisations must undergo annual surveillance audits to confirm that the ISMS remains effective and is being continuously improved. At the end of the three-year cycle, a full recertification audit is required to maintain certified status.