Method for the assignment of industrial field devices in a cloud environment

A field device, comprising:

• a unique user-non-specific private security key already generated in a production process such that the unique user non-specific private security key is able to be used for authentication in a cloud environment, and
• a public identifier already generated in the production process such that the public identifier is able to be read only in a physical vicinity of the field device;
• wherein the public identifier is configured to be scanned by a user using a mobile terminal;
• wherein the unique user-non-specific private security key is configured for authenticating the field device in the cloud environment;
• and
• wherein the field device is configured to be assigned to the public identifier by the cloud environment.

An application program for a mobile terminal, comprising:

• a program segment for registering a user in a cloud environment,
• a program segment for scanning a public identifier of a field device using NFC, by recording a QR code using a camera or via Bluetooth, wherein the public identifier is generated in a production process such that the public identifier is able to be read only in a physical vicinity,
• a program segment for checking, by establishing contact with the cloud environment, whether the field device is already linked to a user account, and for outputting a corresponding warning, and
• a program segment for triggering linking of the field device and the previously scanned public identifier,
• wherein linking includes authenticating the field device in the cloud environment using a unique user-non-specific private security key generated in the production process such that the unique user non-specific private security key is able to be used for authentication in the cloud environment and assigning the field device to the public identifier by way of the cloud environment.