A course registration system is a computer system used by the university's administration to

plan courses, for students to register for courses, and for faculty to grade them.

Students and faculty can only enroll or teach a class if they have been recorded in the

registration system. Students are entered into the system by an Admissions representative,

faculty members by a Human Resources employee. For all persons, their university ID number,

last name, first name, date of birth, and username is recorded. Usernames must be unique $($no

username may be allocated to more than one person at a time$).$

Before students can enroll for a course, the course needs to be created. Each course is

identified by a course number $($up to $7$ characters$),$ a course name, credits awarded, and a cap.

The cap represents the largest number of students that should be enrolled in the course and

must be greater than zero. Courses are created by faculty.

When the university's administration decides to offer a course, a department chair creates a

course section. Department chairs are faculty members who have been given additional duties.

The course section always refers to a single course and has a course section identifier $(3$

characters$)$ and a term in which it is offered. The faculty member who is assigned to teach the

course is also recorded with the section.

When students start enrolling for a course, they must search for available sections and choose

one. Students may only register once for each course in a given term, but if a course is offered

in multiple sections, the system must be able to track which students are enrolled in each

section.

Faculty can grade courses. Each student can only receive one grade for each term in which they

take a course. When grades are recorded, the registration system must record who issued the

grade, and when it was issued. The database must enforce that only valid grades can be

assigned. Valid grades include F $($fail$),$ D$-$ through A$+,$ and I $($incomplete$).$

The Registrar's Office can create transcripts of grades. Faculty advisers can inspect transcripts

and enrollments for student advising.

According to the Course Registration Scenario content above, create a threat model of the scenario.

Create Data Flow Diagram $($DFD$)$ and analyze them using STRIDE