Scalda

Scalda is a vocational education institution based in Vlissingen, Netherlands, operating within the Dutch secondary vocational education (MBO) sector. It provides career-oriented training programs aligned with regional labor market needs, serving students seeking practical qualifications for technical, service, and professional occupations. As an MBO-instelling, the organization falls under the Netherlands' national education framework, which integrates vocational training with apprenticeship components. Its operations directly support workforce development in the Zeeland province and surrounding regions, where skilled trades and technical professions form significant economic pillars. The institution's infrastructure includes networked digital systems supporting both administrative functions and classroom activities, reflecting the sector's increasing reliance on technology for educational delivery.

The organization faced severe operational disruption in December 2022 when coordinated distributed denial-of-service (DDoS) attacks originated from within its own network. These attacks overwhelmed servers, forcing class cancellations and causing widespread Wi-Fi outages that critically threatened educational continuity. Technical countermeasures implemented to mitigate the attack inadvertently restricted legitimate network traffic, compounding operational challenges. Scalda responded by filing a police report, engaging cybersecurity specialists, and collaborating with its network provider to bolster defenses against future incidents. Law enforcement initiated an investigation into the internally coordinated attack, while the institution appealed for internal information sharing to identify potential perpetrators. This incident underscored vulnerabilities in educational networks to internally orchestrated disruptions and highlighted the sector's growing exposure to cyber threats targeting critical infrastructure.