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Voltar para Criptografia I

Comentários e feedback de alunos de Criptografia I da instituição Universidade de Stanford

3,316 classificações
686 avaliações

Sobre o curso

Cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key. Throughout the course participants will be exposed to many exciting open problems in the field and work on fun (optional) programming projects. In a second course (Crypto II) we will cover more advanced cryptographic tasks such as zero-knowledge, privacy mechanisms, and other forms of encryption....

Melhores avaliações


Jan 14, 2020

Provides a comprehensive introduction to cryptographic history, current technology, best practices and known attacker techniques. A great deal of material is covered in a relatively compact program.


Dec 16, 2017

This course gives is perfect to start learning cryptography, explanations are detailed, topics carefully selected combining theory with real world examples and making emphasis in important details.

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576 — 600 de 672 Avaliações para o Criptografia I

por HMY

Oct 21, 2017


por Rolando A C V

Jan 24, 2017


por Le H

Nov 09, 2016


por Tanmay S

Dec 15, 2019


por Ovchinnikov E M

Mar 24, 2019


por Amit S

Dec 26, 2017


por QiangqiangNiu

Nov 20, 2017


por Rishav C

Dec 30, 2016


por Deleted A

Apr 30, 2016


por Adriano F d a

May 07, 2019


por Steven X

Mar 16, 2017


por Rob A

Mar 07, 2020

This must be an incredibly difficult course to try to teach in six/seven weeks. There's a ton of material to cover and I appreciate that the course touches on all of the basics of crypto that are actually in use.

My only complaint is that some of the questions on the quizzes were really repetitive week-to-week. In particular, every week features a question (usually #3, if I remember correctly) that had you choose which constructions out of five choices were "secure" as per the definition of security for that week's topic. The problem was that the correct and incorrect answers were always similar, even though the security concept for each week was different! In other words, there are some things that will NEVER be secure for any crypto system. Every version of the question had several choices that fell into this category. It got to the point that I usually got the question correct on the first or second attempt without even trying that hard. In reality, that question should have required a lot more brain power from me because those security challenges are actually sometimes very subtle and difficult.

But that's truly my only criticism. I loved the course and the programming assignments. I'll be keeping an eye out for any more courses taught by Dr. Boneh.

por David R

Jun 01, 2020

The theoretical part of the course, though dense and fast paced, was very informative. Being recorded it had the advantage for the student of being pausable and repeatable. The great disappointment was the programming part of the course, which I was very much looking forward to, in which the problems were great and have great potential to help the student learn something, but help was minimal (rather tautological, unrevealing, or plain condescending). Fortunately, the programming assignments were option and did not count towards the final grade. But I repeat, they do seem immensely valuable in their topic and difficulty as a learning experience, but guidance in a programming part of the course would be welcome for a change.

por JOHN P

Dec 06, 2017

Overall, a great course! There's always room for improvement. Certain complex and critical concepts were glossed over way too fast in the lectures (with speech compression in the recordings to boot), while other introductory material was gone over too slowly. There is an answer string evaluation problem in the Q's & A's where the required answer must contain a bullet dot to represent multiplication (an 'x' is not accepted) but the standard computer keyboard does not contain a bullet symbol, you have to be in a word processor to create that. Also, there are correct alternative answers for Q#'s 6,9, &12 in the Week 5 Quiz that need to be re-evaluated.

por Owen L

Jun 12, 2020

Good course, covers pretty interesting material. The level is quite high and technical though, so I wouldn't call it introductory - you definitely need a basis in CS/algebra and a basic understanding of computer security in general.

Quizzes and videos are good but the course could use a better emphasis on coding (the programming assignments provided very little guidance and there's essentially no code in the lectures - probably by design but that can leave you hanging if you're looking for a practical rather than purely theoretical understanding of the topic).

por Daniel M P

Jun 20, 2020

Fast dialog made it so I had to watch the videos multiple times, copy of the discussion in text form helped.

The in the lesson questions, didn't know how to format the responses to make them work. Also when the session when to the question reply mode, it showed the question but covered up the graphic part of the question so you lost that context. Possible because I was full screen mode.

Well done all in all.

por Tim H

Mar 06, 2018

A very good course. The pace is quite high and the material is challenging. I think to get the best out of it you need to spend considerably more time than the course suggests each week and I was not able to do this. However, I have come out of the course with a good understanding of the basic concepts of cryptography and my interest in the subject has been piqued sufficiently to want to find out more!

por Anatoliy K

Jun 23, 2019

I really enjoyed this course! Symetric security was quite easy for me. But when it came to public key security I felt so lost because of all that deep math. Maybe it may have better and more detailed explanation, but maybe it just my problem with math (which I'm aware and aknowledge even without this course :D).But definitely worth time spent. Waiting for Cryptography II now.


por Putcha L N R

Jun 04, 2019

It would be really amazing if Dan tries to go lot more abstract in each video; and not explain the same concepts over and over again. I feel that it becomes particularly boring to keep hearing the recaps over and over again. In general, the course was a tough one for me! But the instructor, with his immense knowledge and great way of explaining things did create an impact!

por Marius C

Jul 27, 2020

Excellent course. One of the most difficult ones I followed on Coursera. It's a bit dry due to the amount of math in such a short time and because it lacks a bit on the practical side of things. The optional coding assignments are good but I would have preferred a more practical approach for the course as a whole.

por Veereswaran G

Jul 14, 2020

This course really a best course for cryptography basics and intermediate level. Only negative thing is that real-time approach of how to use crypto-libraries not explained here. So if anyone want to implement the cryptography standards to their product/design, need to refer other sites.

por Julian E

Feb 16, 2016

I liked the level commitment the programming problems demanded. It truly made you feel you had a deeper understanding of the subject after finishing them as opposed to just reading and answering multiple choice questions. Thanks for putting this together for the world to learn!

por Nikolaos K

Oct 13, 2019

Some of the questions in the quizzes were vague and hard to comprehend. Also the professor's hand writing on the notes doesn't help since it's messy and the marker quality is not that good either.

Apart from the above, a good intro course to crypto, thanks.

por Alain G D

May 10, 2020

A very good presentation of the theory of cryptography algorithms, but I'm disappointed that Crypto II is not available for now: some important points such as SSL/TLS crypto protocols or eliptic curves are not described at all in Crypto I.

por Domingo

Nov 28, 2016

The course is really what I wanted: It covers theoretical and practical aspect of cryptography. The exercises are also very well designed, although, I found some of them quite difficult.

Overall, I would recommend this course to a friend.