Eusko Segurtasun Zerbizu
Euskadi Security Service
Agency overview
Formed 2001
Jurisdiction Euskadi
Headquarters Donosti, Euskadi
Employees About 550
Agency executive Leire Oiarzabal Nieto, Zerbitzuburu (Chief of Service)
Parent agency Defentsa-Sailburua
Child agencies EKCERT (Euskadi Computer Emergency Response Team)
SERTITEK (Certification Authority for IT Security in Euskadi)

Eusko Segurtasun Zerbizu (ESZ) is an Euskadi intelligence agency at the level of government agency. It is responsible for proactive national security, identifying national objects of special interest (for example the national oil company Petronor) and reducing their vulnerability to internal and external threats. The agency performs threat analysis on physical objects of national interest, and is also known to work with experts on computer security and data encryption. The cooperation with the Ertzaintza and the Indar Armatuak Inteligentzia Zerbitzua (IAIZ) has been identified as a very important part of the task of maintaining an overview of potential threats to objects, and instituting proactive activities.

ESZ also cooperates with the Herri Babes Zerbitzua - HBZ (Civil Protection Service), intended to prevent loss of life and maintain health, environment, important society functions, and material assets in connection with accidents, catastrophes, terrorism and other unwanted events in peace, crisis and war.


  • Security Act
  • Defence Secrets Act
  • Defence Inventions Act
  • Arrangement on certification of information systems and products (SERTITEK)
  • Coordinating role in preventative work and responses against IT security breaches aimed at vital infrastructure in Euskadi. (EKCERT)
  • Currently developping the Euskadiko Defentsa Ordenagailu-Sare - EKOS (Computer Defence Network of Euskadi) strategy
  • Gathering and analysing of information relevant for protective security services
  • Information, advice and guidance
  • Oversight and Inspections
  • Information assurance
  • Development of security measures (R&D when needed)
  • National and international cooperation
  • Monitoring of information systems
  • Technical Security Counter Measures (TSCM)
  • Production and accounting of CRYPTO-material
  • Central Personnel and Facility Security Clearance Registry
  • Body of Appeal when Security Clearance is denied


ESZ is organized into five departments and a secretariat.

Department for Culture of Security

  • Personnel Security
  • Security clearance
  • Safety culture


  • Online Security
  • ICT threat
  • Proximity Warning System for Digital Infrastructure
  • Event Management (ICT-events)
  • Operations (ICT events)

Department of Communications and System Security

  • Cryptosystem
  • National manager of kryptomateriell
  • Protection of compromising electromagnetic radiation (TEMPEST)
  • Technical safety surveys
  • Physical protection
  • System
  • Certification, including SERTITEK
  • Network Security
  • Intrusion Testing
  • Application Security
  • Document Security
  • Server and Client Safety

Department of Security Management

  • Planning and implementation of supervision
  • Security Authentication Information
  • Security Classified procurement
  • Control of the defense important inventions
  • Airborne Sensor Systems
  • National Emergency
  • Assessment of safety conditions
  • Valuation (What is worthy of screening information)
  • Object Security
  • The Secretariat of the Coordinating Committee for the prevention information (CIS)


  • IT Operations
  • Salaries
  • Accounting
  • Purchasing
  • Archive
  • Reception
  • Personnel
  • Economy and business management and control
  • Conference management

Management Secretariat

  • Legal
  • Security Management
  • Communication and Public Relations
  • Strategy and Policy

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