Biotechnology proponents claim that the public has a duty to trust biotechnology due to its potential for handling significant future food security challenges. This article uses Kant’s moral and political philosophy as basis for constructing a framework for analyzing trust as a moral duty, both in personal relationships and in institutional settings. This includes trust in technology that is of societal significance. A discussion of key concepts of trust leads to an argument that there is a conditional duty of reflexive (...) trust in fundamental social institutions, including technology. However, reflexive trust in, for example, food biotechnology cannot be conceived of as an individual task. A duty of reflexive trust in technology can only be achieved within a publicly controlled institution of trust-building systematic distrust. This system should ideally clarify which instances and to what extent a technology is ethically justifiable and of benefit to society in general. (shrink)