Lecture 24: Man-in-the-middle Attack, Certificates and PKI by Christof Paar

Dear professor,

i watched the entire course, these lectures are wonderful, thank you for everything.

Have you planned to upload the next course? in one of your comment you said that maybe you would have done it in the early 2017, are there any news?

thank you very much professor! I have learned a lot from you.

Thank you so much sir.
it helped me a lot.

Dear Professor Christof Paar, I am doing a Master's Program at Hector School, KIT. We had a module in Safety and Security in IT and I had to give my exam on it. Your 24 videos cover almost each and every topic and much more in detail what we studied at Hector School. I went through each and every video almost 5 to 6 times and passed my exam with a very good grade. I am very thankful and grateful to you for putting this immense knowledge of yours in Safety and Security on you tube which is benefitting thousands around the world. Does your book or lectures also cover the concept of key and encryption decryption functions, the role each plays and how they are differentiated from each other. Thanking you and best regards.

Had to teach crypto to some people and I never attended a crypto class before. Your book and videos are very well done. I have mathematical background and I like the way the math is packaged in your book. Just the basic minimum and no side shows, but sufficient to understand the mathematical background required. I particularly like the way quotient rings are introduced (In AES) without mentioning them by name. Of course one can go out and read more math but this book has figured out the best of both worlds. Some books and online notes go a little deeper with the math but you found the perfect balance. One just needs to be a little patient with the book. Now going over to the crypto website to play around with the other tools and resources. Your book is great and I now have some fancy applications to add to my abstract algebra classes. Thank you and God bless you.

Dear Professor Paar

Even if I Fail in My Examen , you are awsome , we love you.

thank you <3

Went through all the lectures before the examination (we have a very similar curriculum, though all in one semester). It was truly an awesome refresher. Thank you!

Thank you very much for this series of videos. Even for someone with a strong interest in cryptography, you gave me some insights into stuff I had missed in my own studies. I wish I had seen these videos earlier, it would definitely have triggered my crypto interest earlier :)

Dear professor , please give me idea for project on cryptography

Thanks a lot Professor Paar.
Great lectures, I watched the entire series.
Best video lectures on the web probably!
Looking forward to any updates on the series.

Thank you so much for these brilliant lectures! I have now finished watching all of them and I must say that they have really sparked my interest in cryptography.

Professor Paar, thank you so much for making these lectures available to the public. You have taught me a lot.

these lectures are great is this the last one?

how doe bob verify that the certificate is no coming from Oscar again? also to clarify what was said at the end of the lecture did you mean that Oscar can not really learn about a public key because once the reall key is used it is not needed again ?

great lectures.. thankyou.

Not all heroes wear capes!

Dear professor, you are the definition of how teaching should be done. I cannot stress enough how thankful I am for your lectures. I wish I could attend all of your classes, to learn as much as I can from you! Thank you!

Thank you so much for publishing this course. I am studying through distance education and our assigned coursebook is very very dry and difficult. Your lectures are so much easier to comprehend.

You are awesome. I like the way you teach and you are also very good at what you are doing! Thanks a lot!

Is there are any other ways to say except thank you professor Paar. Hope to visit you someday, for the knowledge and passion you have for this subject. I wish my computer network security professor were active like you. Whatever I have learned this semester is because of your book and video lecture. If you write in any blog please share.

This feels like the end of an amazing series on Netflix. Thank you Professor Paar for sharing this knowledge publicly!

Professor Paar, I am taking a class based on your "Understanding Cryptography" textbook. I am following along with you. Unfortunately, I am unable to go over problem 13.12. Does anyone in the comment section of his videos have any suggestions? Looking for any sort of help.

Both Alice and Bob each has got a pair of keys respectively (a public key and a private key). When Alice sends a message to Bob, she uses Bob's public key for encryption which only Bob who has the private key to decrypt it, the man in the middle Oscar does not have Bob's private key, how does he decrypt the message Alice send for Bob?

I went through all the lectures. Thank you Prof. Paar for a well design and presented course. I already bought the book and it will be my primary reference book on these topics.

In the video, I heard Prof. Paar mentioned there are a few more classes after this, probably more on some practical applications. Can we see those as well?

Dear Paar, your lecture is so wonderful and I bought the textbook you wrote. I suppose that If we can get some Openssl command hands on, it will be greater!!

Thank you sir for this great course which you made it available.

Watched all the lectures, awesome content, thank you for making these available to the community

I'm now more interested in Cryptography and all thanks to Professor Paar who made cryptography simple.This whole series feels like a netflix show and I got goosebumps at the end :D

Thank you Prof. Paar for sharing the lecture to the public. It is very helpful.

Thank you Professor Paar!
Would it be possible to have the rest of the lectures?

A big thanks! It was really interesting, and I learned a lot! I just finished the series... The feeling is the same as when you finish of a very good book. I hope that in future there will be more published courses by professor Paar.

Thank you for these lectures !!

If Oscar sends the Alice certificate with Alice's public Key prentending that he is Alice ,how Bob can know that he is communicating with oscar and not Alice?

Thanks
-Oscar 🐻‍❄

I wish I go back in time and attend one of your lectures as a student.
Thank you for everything.

Thank you for these amazing lecture series.

I FEEL SO POWERFUL AFTER LEARNING ALL THIS!!!

I CAN'T THANK YOU ENOUGH PROFESSOR.

Hello Dr Paar,

Thanks for putting this out there. These lectures are awesome and kept me super engaged. You have a talent for explaining things elegantly and simply this free high-quality knowledge being out there is a huge gift for everyone.

Hello Prof. Paar, Thank you for your course series. You are doing invaluable service to many of us by providing them to us free. Combined with your book, these videos are a great help! I am requesting you to see, if you plan to offer recorded classes/courses which we can watch, on Post-Quantum Cryptography, specifically the CNSA 2.0 Algorithms suite? It will be a great help as these algorithms are becoming a must need in cryptographic design implementations. Thank you for anything you can offer. Much appreciate your time and help. - Sadha.

thanks for everything is there a way to upload the last four lectures to complete the course

Thank you for your efforts

Thank you Professor, great lectures.

Thank you sir for you service, I have learned a lot.