Methods and apparatus, including computer program products, implementing and using techniques for managing security and privacy associations between an electronic product code value and an address of a repository containing information about an item represented by the electronic product code. A security certificate is issued to each of one or more parties that are authorized to use the repository. In response to a party among the one or more parties sensing the electronic product code, a record is created in the repository. The record represents the sensing of the electronic product code and includes a security certificate belonging to the party that sensed the electronic product code.
Computer Technologies- Software