Alhamdulillah. Finally, I can pass this course, although not perfectly 100%, but I really proud of my self. Thanks to all lecturers in this course. I've got a lot of knowledge so far, especially in Number Theory. For cryptography subject, that's so hard. Not every people can solved it perfectly since it need a lot of creativity and logic.

The course material is very good. The exercise is very well prepared, especially the RSA quest in the end. Although the lecture in Week 3 and 4 seems a little bit fast, it's reasonable considering the amount and complexity of the knowledge that needs to be covered in such a short amount of time. I highly recommended this course.

My only critique to this course are the final two quizzes of week 4. The very final quiz relies on you having successfully completed most of the penultimate quiz and is more of a "copy and paste" session. The RSA part (week 4) of this course had not been covered at my University and was very interesting.

It was a huge fun to do the last quiz when you follows all the constructions and instructions made, and suddenly it felt like a new world full of interests opened to me, with only one single but complicated (just for me lol) case in cryptography, and inspired me a lot in this *mighty* field.

Alhamdulillah. I have learnt many things from this course. Thanks the three course instructor for taking this course. Most interesting things of the course for me was The end RSA Quest quiz. Again, Thanks coursera.

Thank you! enjoyed learning number theory, understood new concepts of modular programming, how public key -private key works and the basis of rsa algorithm.

Excellent course to learn number theory and building blocks of cryptography. Excellent instructors make such topics easy to understand and not boring.

Excellent material and teachers.

Specifically, the course contents of week 4 : the RSA quiz and the RSA quest quiz material is outstanding! Kudos!

Excellent course to learn number theory principles and relate them to asymmetric cryptosystems. The course is highly rigorous and challenging.

This course was amazing! Got a good, but brief insight into the basics of cryptography. The examples at the end of the course were great!

Its a good course to the beginers of cryptography.If you want to join you should know basic number theory and computer language python.

Enjoyable and informative if the student applies oneself. RSA Quest was fun even though the last question was beyond me.

This course introduces one into the world of cryptograghy and was very interesting especially the RSA Quest.

Very good course to learn the basic concepts of number theory and cryptography, and how to implement them.

I really appreciate the teachers' effort for the quests.

The most fascinating assignment ever.

Very challenging and exciting to. It was not math it seemed to be like more of puzzle games

A Very Good Course for Beginners who want to start learning cryptography from scratch

for the joke at the very end of the final project, i give this course 5 stars

The best course I've taken on Courses – and I've completed 20+ MOOCs!

Excellent course, very detailed background and nice exercises!

Good understanding mathematics fundamentals for cryptography.

I can't really get sync b/w mathematics and programming

Thanks for this course. This course is useful for us.

The course 's great. I gain a lot of useful knowledge

Very fun and simple, maybe too simple, but it's fine