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學生對 斯坦福大学 提供的 密码学 I 的評價和反饋

4.8
3,025 個評分
604 條評論

課程概述

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....

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BH

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.

BC

Mar 11, 2017

Cutting edge cryptography topics. Good explanations and slides, but pause button is highly recommended. Can be a bit too mathematical for the general public, and not very formal for mathematicians.

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501 - 密码学 I 的 525 個評論(共 588 個)

創建者 Rishav C

Dec 30, 2016

none

創建者 Michal J

Apr 30, 2016

Nice

創建者 Adriano F d a

May 07, 2019

god

創建者 Steven X

Mar 16, 2017

:)

創建者 Benjamin W

Sep 15, 2019

This is an excellent and challenging course that covers the basics of symmetric key cryptography, authenticated encryption, and public key cryptography. These topics are covered from both mathematical (notions and proofs of security) and computational (algorithmic running times, attacks) perspectives. The material is well-selected and progresses in a logical manner. Many of the key ideas are reinforced through their recurrence throughout the course in different contexts. The individual lectures also have a very natural flow: I would find myself wondering something about the topic under discussion, only to have my precise question answered moments later. Mathematical proofs are often given in a somewhat high-level, intuitive way but without truly sacrificing rigour. The in-lecture questions are well-chosen to force you to really think about the material under discussion and the quizzes, although sometimes challenging, are interesting and help teach material left out or only brushed over in the lectures.

There are also optional programming problems, which were quite instructive. A couple of these involve implementing attacks on insecure cryptographic protocols; a successful implementation would lead to the decryption of an encrypted message, which I found to be not only extremely rewarding, but also especially instructive (much more so than simply implementing a cryptographic protocol, which was the goal of at least one assignment). I found it a bit strange that these highly relevant assignments were optional, however. I suppose this is perhaps so that a programming language is not a prerequisite for the course. However, I think several ideas in lectures would be rather difficult to understand without programming knowledge and in any case the level of mathematical maturity demanded for this course is much more of a requirement than some basic programming ability.

My main complaint really regards the speed at which most lectures are given. It seems to me quite unfortunate that so many hours of excellent lectures were recorded at such a speed that you're basically forced to slow the lectures down (which sounds strange) or pause every few seconds in order to digest the material properly. In a university classroom, you have a fixed amount of time to deliver material, but there's simply no reason to go so fast in an online course.

創建者 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.

創建者 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!

創建者 Oleg L

Jul 24, 2017

Course was very fun to learn, and the instructor was very clear and concise with the lecture. I was slightly unprepared for the difficulty level and math involved, but reviewing the videos and discussion group cleared things up. Do not attempt this course without prior knowledge of some discrete math, otherwise it was a very in-depth course which covered many topics, and I would recommend it to peers.

創建者 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.

Thanks.

創建者 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!

創建者 Andrea G

Mar 13, 2018

Not a trival course, you should definitively pause the lessons several times in order to take notes.Some of the exams are far to be trivial. A little bit too theoretical, but gave me a good insight of topics I need to understand in my professional life. I would definitively recommend it

創建者 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!

創建者 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.

創建者 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.

創建者 Pablo G A

Apr 03, 2018

The course is very interesting and the topics are very well explained by the proffessor. I didn have a wide background about cryptography but still could learn a lot. Congrats!!. I would preffer more examples and not so much theory.

創建者 Horacio G A

Jun 30, 2017

The content of the course is excellent. Sometime the excercises are a bit confusing because the losse of information in the content. Also is a little quick but I found it excellent to be an introduction to Cryptography.

創建者 Casper v G

Sep 26, 2018

Though the material is quite challenging, professor Boneh explains it quite clearly and at an easy pace in his lectures. I found it very interesting to learn more about encryption and how the current standards work.

創建者 Nickolas F

Sep 29, 2017

An amazing course that provided me with important tools in cryptography. I hope I see more courses like this in the future and a special thank you to Professor Dan Boneh for teaching this course. Thank you.

創建者 Dan D

Jun 03, 2018

Really interesting and comprehensive course. Sometimes really important concepts were glossed over quickly which made it occasionally tricky to follow but then it is tricky subject matter!

創建者 Ricardo d C C

Oct 14, 2018

It is really interesting and clarifying. It does require much attention to details and taking a lot of notes, however. It focuses on the theory, with practical examples. I sure liked it.

創建者 Gabriel D O

Aug 23, 2017

The lectures are very good. Easy to understand and keep on track. But the lecturer could enunciate better. But that is also not a huge issue since pausing and replaying is an option.

創建者 Howard ( R

Aug 11, 2017

Excellent material. As usual with computer science courses, some of the material could be presented a bit more clearly. But I am really happy to finally understand this material now.

創建者 Marcos E K

Apr 29, 2017

Great intro to a complex topic.

It could be improved by having the programming assignments be:

+ Mandatory

+ More related to actual cryptographic algorithms/libraries (only some are)

創建者 Kris J

Feb 09, 2020

Interesting and learned a lot, but probably need a greater foundation in hex and mod math than I had. I suspect there are prerequisites re in the formal program.

創建者 Tristan B

Nov 17, 2019

Good overall course, it could use an update on some minor points. Theory is a strong part of the course. I hope the Crypto II course will be up one day.