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thank you very much..

just finished this course a few minutes ago and I can't believe that it came to an end so prematurely, it did not go over public cryptography systems and their core principles. also did not dive into symmetric cryptography algorithms and their mechanics, I wish I knew why.

thank you.

The Course was hard to grasp, Sometimes felt certain things were unclear like while explaining the theory that has numbers please add it on the screen. But It was one of the most educational and helpful courses on cryptography.

Take this course at your own risk!! Although course rated beginner, topics taught are not meant for beginners. You should already have previous knowledge in cryptography to successfully grasp knowledge given in this course.

This course makes me know more about the history of cryptography and some other attacks precisely.

The lectures were all abstract. There was rarely examples used to visually show what concepts meant. He basically just talked about crptography for 3 hours. For example, the whole third week is about Hash Functions, but he only talked about it as an idea. Go through just ONE crypthographic hash function so that people understand what it is. I've taken Data Structure and Algorithms, which is why I already know what they are, but it was still extremely hard to follow because he was talking about cryptographic hash functions and not hash functions for hash tables. The difference between preimage and second preimage was probably the only time he used any sort of example, but even that wasn't fully mapped back to cryptography. I'm going to try the second course in the specialization, but if it was anything like this, I won't continue.

Personally, I found this course to be pretty anti-didactic. First, it is listed as a beginner course, but some of the probability concepts aren't explained directly in the course. Another observation is that almost all of the aditional readings provided are from Wikipedia - I get that many courses need to have a self-taught part for the student to better comprehend the concepts or get a deeper understanding, but had I wanted to read only Wikipedia articles I could've done that without enrolling to this course. Lastly, I think it lacks exercises to put the knowledge into practice. However, it did gave a quick review of many basic concepts and serves as an introduction to the field.

Nice and easy undergraduate course, but not useful for students seeking for a big picture of state-of-the-art cryptography. Content of this course is way too old.

Encryption/decryption of English characters are dinosaur technologies for telegraph, which itself has disappeared in modern communications.

Too many historical tales, too few modern technologies, and almost no technical details or math.

BTW, there are quite a few mistakes in slides, and the instructors don't response questions on discussion forums.

I don't believe students should start from the ancient age to learn modern cryptography, not very useful course in general.

The videos are way too long with too much info cramped up and there is no formative evaluation after each one. So when you get to the summative evaluation after like five 15min videos with too much info you basically dont remember half of it, so you end up going back to do all over again. They also dont provide any real material other that wikipedia links, a book with the topics taught would be way better, if I wanted to go to wikipedia I wouldnt be here. I like the subject but this course is not well made compared to others

not a lot of examples. teaching was way to boring.

The WORST introductory class I ever saw, ever ... Cryptanalysis in week 2 ??? Are you kidding ??? Using public key without introducing it ??? Who cares today about Vigeneres ???This class is a pony show, a show off of knowledge, certainly mastered but presented in lightning speed on fundamental concepts ... Awful ... The math part is also weak and muddy. It's an example of what not to do when introducing people to cryptography. Such introduction should be for the whole spectrum of skills needed in IT which is by far NOT cryptanalysis but just understanding what is going on and what the applications using crypto are doing when operating a PKI, issuing certs, authenticating using public key cryptography etc... We have way too many people in IT saying "signing with a certificate". This is what needs be solved. And future cryptanalysts are likely less than 1% of that crowd. Unbelievable ....

I think this is the worst course in Coursera which I have taken. The lecture is very bad , only see the teacher saying from begining to the end, without prepare any animation and slides. I can not remember so much usefull knowledge about the Cryptosystem in the course, I should self learning a lot of things from the link after each course. The professor did not give me any more value but only some link from wikipedia.