In this project, you will create a portion of a threat model for an imaginary system. Real threat models are large and generally involve multiple contributors. For this reason, you will not be writing an entire threat model, but instead will be creating some specific components. While a real threat model would not be done individually, this is an individual effort project. No groups are allowed.

You may choose either of the following two systems to create a threat model for:
–A smart home system, with an Internet connected hub allowing control and automation of lights and other devices in the home.
— An e-commerce web site, allowing online purchasing of products.
— You may also suggest your own scenario, but in this case, you must get permission from the professor before proceeding. Your scenario should be approximately equal in complexity to the two suggestions given.

These scenarios do not have many details specified. Please make reasonable assumptions about how you expect the systems to realistically function. At a minimum, each of the suggested systems has a front end system that has interactions with users, some type of authentication, and interactions with at least one back end server. If you are unsure if assumptions you are making are reasonable, please ask on the project 1 discussion forum.

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1) You must create a level 0 data flow diagram that shows the interactions of external entities with a multiprocess. You must create a level 1 data flow diagram, that shows the main flows of data between processes in the system and data stores. You must choose two specific function of the system and create level-2 data flow diagrams for those functions (you will have two different level-2 data flow diagrams). All four data flow diagrams should show trust boundaries.

2)Use CAPEC to find potential threats in your system. For at least two attack patterns listed in CAPEC, find corresponding threats to your system. Each attack pattern may correspond to multiple threats (which you may or may not have already identified using STRIDE). For each threat, indicate the data flow diagram element or elements it affects, the CAPEC attack pattern, and a brief description of the actual threat.

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3) Identify threats using the STRIDE method in conjunction with your data flow diagrams. Create a list of additional threats. For each threat, indicate which STRIDE category it fits into, and which element of your data flow diagrams it is associated with. Please include only realistic threats. Do not include several threats that are near duplicates of each other (“infects system with virus X” and “infects system with virus Y” should not be separate items). Threats with differing likelihood or impact should not be grouped. You must identify at least 20 threats, which must include at least one in each stride category.

4) Choose two threats in the system (identified in step 2 or 3) and create threat trees. These trees should each have at least three levels and ten nodes, including “or” and “and” nodes. At least one of your trees must be annotated in some way to help analyze the threat (up to you what annotatoin to use)

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5)For at least 5 of the threats you identified, determine the risk associated with the threat. You may use any of the methods which will be discussed in week 6 videos, but your answers should be justified.

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