ISO 27001, explained simply: the standard that proves a company protects your data

In short: ISO 27001 is the international benchmark standard for information security. A certified company has put in place a complete system to protect the data it handles, and an independent body has verified it. Concretely, it is proof that your data is in good hands, not just a declaration.

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What is ISO 27001?

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ISO/IEC 27001 is a standard published by the International Organization for Standardization (ISO). It defines the requirements for setting up an information security management system (often abbreviated ISMS).

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The idea is simple. Rather than securing data on a case by case basis, the company puts in place an organized and lasting method to identify its risks, protect against them, and continuously improve. The certification is issued by an independent body after an audit, and it is re-verified regularly. So it is not a logo a company gives itself, it is an external control.

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What the standard really requires

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Being ISO 27001 certified does not mean "having a good antivirus". The standard calls for a complete approach:

• Analyze risks: identify what could threaten the data (hacking, human error, breakdown, leak) and prioritize them.
• Put in place measures suited to those risks.
• Document and trace: write down the rules, keep proof of what is done.
• Control and improve: audit regularly, correct, start again.
• Involve management: security is not only a technical topic, it engages leadership.

In short, the standard verifies that security is steered, not left to chance.

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The Annex A controls: 93 measures, 4 themes

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At the heart of the standard is a list of concrete security measures, called Annex A. In the current version, it counts 93 controls, grouped into four themes:

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Organizational

The rules and policies: access management, supplier relationships, incident response.

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People

The most common factor in incidents: awareness, training, managing departures and arrivals.

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Physical

The protection of premises and equipment: access to sites, servers and workstations.

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Technological

The technical core: encryption, backups, logging, development security, protection against malware.

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ISO 27001:2022: what changed

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The version in force is ISO/IEC 27001:2022, which modernized the 2013 edition. Two changes to keep in mind:

• The controls went from 114 to 93, reorganized into 4 themes instead of 14, for greater readability.
• 11 new controls appeared, covering topics that have become central: cloud security, threat intelligence, data protection, development security.

Companies already certified on the older version had until 31 October 2025 to move to the 2022 version. Today, an up to date certification is therefore the 2022 one.

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Why it matters when you pick a provider

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This is where the standard becomes very concrete for you. When you entrust sensitive data to a software (identities, supporting documents, banking data), you inherit part of its security level. A poorly protected provider becomes your weak point.

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ISO 27001 gives you a reliable benchmark: instead of trusting a sales pitch, you rely on an independent audit. This is exactly the logic of Know Your Business and the assessment of your suppliers: verify before trusting. And for financial players, this requirement connects directly to DORA, which requires companies to frame the security of their IT providers.

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ISO 27001, GDPR, DORA: how they fit together

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These three frameworks complement each other, they do not replace one another:

• GDPR frames the protection of personal data (legal obligation).
• ISO 27001 organizes information security in general (voluntary and certifiable approach).
• DORA imposes operational resilience on the financial sector and its suppliers (sector obligation).

A company certified ISO 27001 has already laid much of the groundwork useful for GDPR and DORA.

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Meelo's approach

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At Meelo, security is a design principle, not a layer added afterwards. Data is hosted in France, encrypted, access is controlled, and every identity verification or fraud decision is traced and auditable. This rigor serves both the security and the compliance of our clients, as on our identity verification and fraud detection journeys.

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We embed this requirement in an ISO 27001 certification process, to turn this commitment into proof that can be verified by a third party.

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In conclusion

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ISO 27001 is not a marketing stamp: it is proof, checked by an independent body, that a company seriously protects the data entrusted to it. For you, it is a simple and solid criterion when choosing a partner to entrust sensitive data to. Always ask where your provider stands, and on which version of the standard.

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Sources: ISO/IEC 27001:2022, International Organization for Standardization (ISO); ISO/IEC 27002:2022 (security controls).

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