Balancing data protection and privacy - The case of information security sensor systems

This article analyses government deployment of information security sensor systems from primarily a European human rights perspective. Sensor systems are designed to detect attacks against information networks by analysing network traffic and comparing this traffic to known attack-vectors, suspicious traffic profiles or content, while also recording attacks and providing information for the prevention of future attacks. The article examines how these sensor systems may be one way of ensuring the necessary protection of personal data stored in government IT-systems, helping governments fulfil positive obligations with regards to data protection under the European Convention on Human Rights (ECHR), the EU Charter of Fundamental Rights (The Charter), as well as data protection and IT-security requirements established in EU-secondary law. It concludes that the implementation of sensor systems illustrates the need to balance data protection against the negative privacy obligations of the state under the ECHR and the Charter and the accompanying need to ensure that surveillance of communications and associated metadata reach established principles of legality and proportionality. The article highlights the difficulty in balancing these positive and negative obligations, makes recommendations on the scope of such sensor systems and the legal safeguards surrounding them to ensure compliance with European human rights law and concludes that there is a risk of privatised policymaking in this field barring further guidance in EU-secondary law or case law.