A semiconductor device may include a secure memory configured to store a programmable key, an interface for programming the programmable key in the secure memory, and a plurality of configurable features of the semiconductor device that are associated with the programmable key, each configurable feature having a set of multiple selectable configurations, wherein a value of the key defines a selection of one of the multiple configurations for each of the configurable features. For example, the key may include multiple sub-keys, each associated with one of the configurable features, wherein a value of each sub-key defines a selection of one of the multiple configurations for the configurable feature associated with that sub-key. In addition, the full programmable key may enable an additional functionality of the semiconductor device.