IT security policy

Definition of an IT security policy

The Information Systems Security Policy (ISSP) is the reference document that sets out, for any organization, the rules and responsibilities for protecting its information, networks, and applications. Developed by management with the support of the ISSP manager, it reflects the desire to manage the risks associated with internal and external threats—malware, data leaks, human error, or technical failures—by defining a common framework for all users.

Objectives of the IT security policy

The policy primarily aims at the confidentiality, integrity, and availability of digital resources. It specifies the level of protection expected for each category of assets, organizes incident management (detection, declaration, remediation), and ensures that technical measures—firewalls, backups, encryption, access control—are complemented by operational procedures and ongoing employee awareness. In the background, the ISSP also guarantees compliance with legal texts (GDPR, Sapin II law) and cybersecurity standards (ISO 27001, ANSSI).

Key content

A complete ISSP covers:
— governance (roles, responsibilities, funding);
— information classification and the risk analysis method;
— mandatory technical measures (strong authentication, encryption, updates);
— rules of use for workstations, mobiles, and remote access;
— the business continuity and disaster recovery plan;
— the control process (audits, indicators, continuous improvement).

Implementation and life of the document

The ISSP is not a static framework; it evolves with threats, new technologies, and business needs. Its deployment relies on clear communication with users, the integration of rules into daily procedures, and the provision of regular training. Annual reviews, coupled with penetration tests and incident simulation, verify the effectiveness of the measures and adjust budgetary priorities. Feedback (post-mortem, alert dashboards) feeds this continuous improvement loop.

In summary

The IT security policy formalizes the principles, means, and responsibilities that ensure the lasting protection of a company's digital assets. By combining clear objectives, a best practice framework, and continuous monitoring, it transforms cybersecurity from a regulatory constraint into a genuine lever for organizational trust and resilience.