Brilliant course. Quizzes and exercises test good understanding of the concepts. Questions are simple if read carefully. Huge shout out to Dan for super efficiency in video lectures.

Excellent. This is a hardcore crypto course with a nice balance of theory and practice. I found the optional assignments particularly helpful to re-enforce concepts taught each week.

Very good lecture. I learned a lot about cryptography and basic ideas about security. I just hope Dan speaks slowly from next lectures. Definitely will take Crpytography II as well.

Excellent course, with lots of theory and real life exemples. Be prepared to dedicate a lot of time and effort to pass this course. One of the best and hardest I took from any MOOC.

Excellent explanation on the concepts of cryptography. The course gradually builds the concept from the basics. The graded assignments are beautifully designed to test the concepts.

This course is f**king difficult!!! But if you're a software engineer, you definitely need this course to make sure that you're using the right algorithm to protect your softwares.

Definitely the most interesting course I've taken on Coursera. Great material, very well presented. I recommend doing the optional programming assignments, they're a lot of fun.

awesome! It takes some time for me to understand some concepts and I need to pause a lot when watching the video, thus it may take you more time to study than the estimated time.

amazing course, i take it 6 years ago and forget everything, but again,learn crypto, like meet a familiar new friend, feel enjoyable with what professor Dan Boneh have taught me

Loved this course.... Dan Boneh is clear, and covers amazing subjects that were not perfectly for me before attending the course (RSA, DH...).

Great job and thank you very much !

I finished the first week of the course, the instructor makes it easier to understand, so far, the course is interesting, I now understands what cryptography is and how it works

I love the pace of the course. The content and narration is crisp and informative. Exactly what i was looking for. I loved the initial brush up sessions on discrete probability.

Wonderful, wonderful course. A journey that establish my mindset for cryptography. My only complain is the long-long wait for the second part of this course - Cryptography II.

This is a very nice course. It is my first Crypto course. Professor Dan Boneh, you explained concepts nicely. It made me realize how crazy and intelligent hacks are possible.

excellent course，the professor explains the concept in this course surprisedly clear. Finish this course can build a fundamental structure to pursue research in crypto field

Excellent course to master the basics of cryptography, and for smart card developers to understand what's written in the specifications. Crytpography II is my next goal :-)

T​his course was very interesting and the explanations, even tho at moments you may need to pause, were understandable and well-served. I am very satisfied by this course.

The course materials are well organized and concentrated. I fully enjoyed the course and learned a lot from it. Courses like this approach maximum efficiency for learning.

Very informative beginner course. Perfect for someone who needs to understand the basics. Prof Boneh's instructions were excellent and the quizzes were tough but valuable.

Really good course, instructor provides real life examples a tries to avoid the mathematic abstractions to minimum - relying rather on intuition and pictorial examples.

A difficult, but rewarding course. Much more theoretical than I was expecting, and I would suggest a strong Maths background for anybody considering taking the course.

This is a really exciting and enjoyable course. I've learnt a lot. The segments are structured very well, and the assessment questions and exercises are very helpful.

Very clear yet challenging introduction to basic cryptography concepts. Be sure to take notes and practice as much as possible with the modular arithmetic presented.

I enjoyed the not-too-much-mathematical approach of diging into crypto basics. All popular (practical) questions arise and are discussed in understandable manner.

Excellent course.. A wonderful mix of sound theory and practical applications. Delivered by one of the top experts in the field and his excellent support team..