This paper addresses how people construct meanings regarding “the concept of security”, based upon the descriptions collected from participants in a case study of the use of electronic identification in ICT platforms in schools. The aim of the paper is to reflect on the concept of security by identifying and analyzing how people build their own understanding of security when using ICT platforms in schools. The analysis identifies three ontological instances of security: security as an ideal state of affairs, security as a value and information security. The analysis also clarifies the difference between the objective and subjective nature of security, as well as the differences between factual and perceived information security. As a result, I raise several research questions concerning “security”, and identify common assumptions with regard to constructing the concept of security.