CS 5430: System Security
CS 5431: Practicum in System Security
Spring 2017
Contents:
CS 5430 discusses security for computers and networked information systems. It focuses on principles and techniques for implementing military as well as commercial-grade secure systems. The practicum, CS 5431, sits at the intersection of computer security and software engineering. It is designed to give students practical experience with building and securing a software system.
Prof. Clarkson's office hours will be posted on Piazza. The rest of the staff's office hours will be hosted in a Google calendar. There are no office hours during official breaks. Office hours end on the last day of classes.
There are separate websites for the main course and practicum. They are http://www.cs.cornell.edu/courses/cs5430/ and http://www.cs.cornell.edu/courses/cs5431/.
We use CMS for submission of assignments and for grading. There are separate courses in CMS for CS 5430 and CS 5431. Make sure you can login to https://cms.csuglab.cornell.edu/ and see CS 5430 (and CS 5431, if you are in the practicum). We are on a new, high-performance version of CMS that is being rolled out this semester to select courses. If you cannot access the course, please verify with the Registrar that you are enrolled in the course. We will not add students to CMS until they are enrolled with the Registrar.
Communicating with course staff in CS 5430:
Please do not send email directly to the course staff, except for the purpose of coordinating meetings. Meetings with the professor can be coordinated through an online scheduling service called YouCanBook.me, instructions for which will be posted on Piazza.
For CS 5430, you need to have a broad understanding of organization and programming of computer systems. Students who have taken a senior-level systems course, such as Cornell's CS 4410 and its transitive prerequisites, should be well positioned to take CS 5430. Knowledge of operating systems, computer networks, and cryptography will be helpful. Assignments might require the use of standard tools and languages such as C, Unix, web servers, etc. You either need to be familiar with these technologies or to be committed to investing extra time to learn them as you go. (Part of becoming a professional computer scientist is learning to adapt quickly to new technologies.)
For CS 5431, the foremost prerequisite is that you need to be a programmer. Students who are not already accomplished in a modern high level language will not be equipped to succeed in the practicum. In previous semesters, projects averaged about 5,000 lines of code, with individual students typically contributing around 2,000–2,500 lines of code. Knowledge of the material in CS 4410 is also a prerequisite for CS 5431.
The following optional textbooks have a large intersection with what we will cover:
There will be no preliminary exams. There will be a final exam in CS 5430 as scheduled by the Registrar.
There will be approximately six homework assignments in CS 5430. They may include written problems and programming problems. Assignments in this course are deliberately underspecified, open-ended, and motivated by problems that arise in the real world—messy as it is—as is consistent with the upper-level, professional, and practical orientation of this course. You will have to think on your own, build tools, refine problem specifications, make reasonable and defensible assumptions, and be creative. Success in this course, as in life, depends heavily on you figuring out what's important and concentrating on that.
Extensions will be granted only in exceptional circumstances, such as documented illness, and are handled exclusively by the Graduate TA for the appropriate course in consultation with Prof. Clarkson. Your copy of a checkout sheet from a medical provider suffices as documentation. Extensions will not be granted for job interviews, large workloads in other courses, or extra-curriculars.
Unless otherwise specified, assignments may be turned in after the deadline with the following penalty applied to the score received:
Weekends (Saturday and Sunday) count as a single day for the purpose of calculating late penalties. So turning your assignment in on Sunday night is no worse than turning it in on Saturday morning.
Here are a few words of caution about CMS and late submissions:
Regrades are intended to correct serious errors in grading, not to dispute judgment calls made by graders. Graders do sometimes take off a little too much, but they just as often give a little too much. In our experience, exceptionally few regrade requests would actually make a difference in the final course grade. So rather than all of us obsessing over regrades, we'd prefer that you spend your time on doing well on the next assignment, and that we spend our time on developing course content.
Do feel free to meet with the course staff if you cannot understand the written comments the grader provided on your solution. But the grade on your solution and/or changes to the grade are "out of bounds" topics for discussion at that meeting, with one exception: grading mistakes of a purely arithmetic nature (e.g., the grader wrote that they were deducting 5 points but entered a deduction of 6 into CMS) can be fixed on the spot, without needing to follow the process below.
If you decide that a serious mistake was made in grading your assignment, then we would be happy to fix it. Here is the process:
Note that this process is entirely written. We will not discuss regrades with you in person; for sake of consistency in grading (hence fairness), we prefer to handle all the regrades for a given assignment at one time.
The deadline for submitting a regrade request is one week after you receive the original grade. Requests submitted after that will be denied without consideration of their merits.
Resist the temptation to use regrade requests as a means to fish for a better grade. Here are two words of caution:
Students in the practicum (CS 5431) will gain additional practical knowledge of security through two activities:
Students enrolled in CS 5431 must also be enrolled in CS 5430.
Absolute integrity is expected of every Cornell student in all academic undertakings. If you are unsure about what is permissible and what is not, please ask.
You are responsible for understanding these university, departmental, and course policies:
Integrity includes you being honest about the sources of the work you submit. When you submit work in this course, you are representing it as the work of the stated authors (i.e., the members of the CMS group who submitted it) subject to any exceptions that are clearly stated in the submission itself. To avoid committing plagiarism, simply be sure always to accurately credit your sources. To do otherwise is to commit fraud by claiming credit for the ideas and efforts of others, and that is punishable under the Code of Academic Integrity.
Grades, on the other hand, are about the course staff assessing what you have learned. If you turn in someone else's work for course credit, and forthrightly acknowledge you are doing so, you are not acting dishonestly and are not violating academic integrity. But you also give us no basis for concluding that you have learned the course content. We recommend the following rule of thumb: Never look at any other students' solutions, or have their solutions in your possession, in any portion or form whatsoever. Also never share your solutions with other students.
We expect the breakdown for the overall course grade in CS 5430 to be as follows:
We expect the breakdown for the overall course grade in CS 5431 to be as follows:
Assignments in CS 5430 are weighted equally, and your lowest assignment score will be dropped. Other factors includes submission of course evaluations and participation in any CMS surveys we might hold.
Sometimes students ask whether the final grade is curved. The answer is that it depends on what you mean by "curved." Any mapping from numeric scores to a letter grade implicitly defines some kind of curve. But we do not give out a fixed percentage of A's, B's, etc. In fact, we'd be happy if everyone in the course learned the material well enough to get A's. Historically that has not happened, though, and the median grade in the course has been between B+ and A-.