| Interface | Description | 
|---|---|
| GpfDsDevice | 
 An interface defining a Dynamic Signature (DS) device using the Gemalto
 Proprietary Formatting (GPF) for generating OTPs. 
 | 
| Class | Description | 
|---|---|
| GpfDsFactory | 
 A factory for creating objects that produce or affect GpfDs (or its relatives) OTPs. 
 | 
| GpfDsService | 
 GpfDsService is the entry-point for using GpfDs services. 
 |