Can the content of a printed dynamic QR code be changed after publication?

How Dynamic QR Codes Work

Dynamic QR codes contain a reference to an external data source managed via a backend system. Unlike static QR codes, where the content is directly encoded in the code, dynamic codes store the actual target content in a database. This allows changes to the target content without reprinting the code.

Modification Possibilities

The target content is changed via the managing system that links the code to the database. This typically occurs through a unique ID or key contained within the code itself. The physically printed code remains unchanged, as it contains only the reference, not the target content itself.

Limitations

Functionality depends on the implementation of the system used. Some systems require an active link between the code and backend, while others update automatically. Additionally, the code can only be changed if the managing service is active and the connection to the code exists. A physically printed code loses its dynamic properties if the backend system is no longer accessible.

Practical Application

In practice, this functionality is often used to update product information or change links without reprinting physical materials. This reduces costs and resource consumption. However, implementing such systems often requires additional infrastructure and security measures to prevent unwanted changes.