sikkerhedslayer

Sikkerhedslayer is a Danish term used to describe the concept of implementing multiple security measures in distinct layers to protect information systems and physical assets. Often translated as security layer, it denotes a defense-in-depth approach in which no single control guarantees safety; instead, several complementary controls reduce risk.

In practice, security layers span physical, technical, and administrative domains: physical security (restricted access, guards, surveillance); network security (segmentation, firewalls, intrusion detection); data security (encryption in transit and at rest, data loss prevention); application security (secure coding, input validation, code review, vulnerability management); identity and access management (multi-factor authentication, least-privilege access, role-based access control); monitoring and incident response (logging, SIEM, incident response).

Design and management principles emphasize risk assessment, defense-in-depth implementation, the principle of least privilege, secure configuration management, and ongoing monitoring and testing. The approach should balance security with usability and cost and align with relevant laws and standards such as GDPR, ISO/IEC 27001, and industry-specific regulations.

Limitations include the risk of misconfiguration, overlapping controls, and a false sense of security if layers are not properly maintained. Attackers may target weaker layers, and security layers require continuous updates and governance to remain effective.

See also: defense in depth, zero trust, security architecture, encryption, identity and access management, data protection.