Security architecture and design real tym r hypothetical

Create a data flow diagram of some system.use real time ir hypothetical.need to write summery explaing the diagram and trust boundries.using STRIDE with data flow diagram,provide list of threats against model.list should include which element of mnemonic they represent(spoofing ,tamperingetc) 

requirements:

1:compleate data flow diagram

2:provide summery of diagram

3:use stride,identify threats