IN9130 – Unassailable IT-systems

Schedule, syllabus and examination date

Choose semester

Teaching and exams spring 2022

In light of the most recent infection control regulations, we will at the start of the spring semester 2022 increase our online teaching, while we at the same time try to maintain in-person teaching where this is possible. We hope to go back to more in-person teaching later on in the semester. You will be informed about any changes in teaching or examinations on the semester page, in Canvas or through your regular channels.

Read more about postponed exams for the autumn semester 2021.

Course content

The techniques presented have for several years been used in design of real time systems and other distributed systems. We concentrate on systems of interacting actors and model such systems in UML. Sequence Diagrams of UML are the core notation for intuitive and formal description of interaction patterns. Topics of the course include:

  • theoretic foundation for UML,
  • refinement concepts in a UML context,
  • modularity through contract-oriented specification,
  • modular security risk analysis.

Learning outcome

After having completed this course you can:

  • make software that is easy to analyse with respect to security and reliability and still easy to maintain.
  • understand how practical software development can benefit from theories about state machines, refinement, security risk analysis, formal reasoning, and modularity.
  • perform a simple security risk analysis.
  • obtain a solid understanding of the theoretical underpinning of security risk analysis.

Admission to the course

PhD candidates from the University of Oslo should apply for classes and register for examinations through Studentweb.

If a course has limited intake capacity, priority will be given to PhD candidates who follow an individual education plan where this particular course is included. Some national researchers’ schools may have specific rules for ranking applicants for courses with limited intake capacity.

PhD candidates who have been admitted to another higher education institution must apply for a position as a visiting student within a given deadline.

It may be useful with knowledge of modeling and formal methods, but it is not necessary.

Overlapping courses


The course is divided into three batches focusing on modeling, refinement and safety analysis, and there is a mandatory assignment per part that must be approved prior to the exam.

There are three hours of lectures and two hours of group tuition each week.


4 hours final written digital exam. All mandatory assignments must be passed prior to the exam.

It will also be counted as one of your three attempts to sit the exam for this course, if you sit the exam for one of the following courses: IN5130 – Unassailable IT-systems, INF5150 – Unassailable IT-systems (continued) , INF9150 – Unassailable IT-systems (continued)

Examination support material

All printed and written exam resources are allowed.

Language of examination

You may write your examination paper in Norwegian, Swedish, Danish or English.

Grading scale

Grades are awarded on a pass/fail scale. Read more about the grading system.

Resit an examination

Students who can document a valid reason for absence from the regular examination are offered a postponed examination at the beginning of the next semester. Re-scheduled examinations are not offered to students who withdraw during, or did not pass the original examination.

Special examination arrangements, use of sources, explanations and appeals

See more about examinations at UiO

Last updated from FS (Common Student System) Jan. 19, 2022 12:18:07 AM

Facts about this course

Teaching language