This is worse course I’ve taken as far as getting certified as far as exams, quizzes. Bad external tools that don’t work. Bizarre instructions to complete exams. And graders who have no clue as to what the issues, looking at questions in forums. The Notebook function is sometimes cumbersome. And use of it as educational material was confusing.However if just auditing, this course is great. And material is covered with seriousness, and goes beyond summary treatments in other crypto classes on schemes based on number theoretic concepts.

Excellent course, this course is more about numerical theory behind cryptography.

It has excellent assignments using Python.

in a short 4 weeks, it explains the theory of RSA well and also the RSA itself.

Formulas, formulas... lack of examples - lack of understandings. Though topics of the course are very useful and interesting.

Last quest was fascinating. But in my case notebook stopped giving me any results and I managed to get only 1/4 of tasks.

This course is not deep and rigorous enough to familiarize you with fundamentals of Number Theory. It just covers some theorems! No reference book is suggested, and worst of all accent of teachers makes it really hard to understand the material.

It serves as a table of contents of the material which makes it useful to seek out other lecturers on YouTube. I wouldn't recommend someone uses this course by itself.

Concepts are poorly explained. It is very hard to follow the instructors. Need better quality courses.

It was indeed a great course. I already had the fundamentals of Cryptography and No. Theory but this course helped me brush up my fundamentals and the instructors kept things simple and concise and most importantly to the point at the same time. The puzzles, quizzes, and the quizzes in between the videos were awesome too.Thank You.

This is a really is a special course. It doesn't have any puzzles like the first few but, you get to go on a RSA quest, ala cicada 3301, and practice your new cryptography skills. At the end of your quest you gain ultimate knowledge.

Really nice introduction to discrete math and basic algorithms. The content is quite basic, but as mentioned in the syllabus is for beginners. Still, for those of you who are at that level is worth taking this specialization.

I was really impressed especially with the RSA portion of the course. It was really well explained, and the programming exercise was cleverly designed and implemented. Well done.

A good course for people who have no basic background in number theory , explicit clear explanation in RSA algorithm. Overall,a good introduction course.

good material, good presentation, very good problem sets. thank you!

Very funny and interesting course. Ideal to play with Python.

I really loved the final quiz. It was very interesting.

Very good introductory course to number theory and RSA.

I really liked the structure of the topics

The final project is absolutely awesome!

Very nice course for beginners

Good introduction

very usefull

challenging

In general, this course is much better than the previous 3, and I enjoyed all weeks but Week 4. I think Michael Levin should improve his explanations, and also try to give further examples about the algorithms he is talking about. I would say that it is worthy taking this course, but I really hope Week 4 can be improved.

Generally pretty good. Pretty easy level, and the maths is undemanding. Some imprecision in the wording of the tests, and a little too easy on the programming side, but well worthwhile if you still have some holes in your understanding of the principles of RSA encryption.

The class was interesting but I felt it was difficult and not explained well...to do the modules I had to constantly go back and re-read the slides, re-watch the lectures. There weren't any examples, I feel it would have been helpful in order to grasp the material.