AES: Advanced Encryption Standard - a Conceptual Review

[@andreyyaskulsky5029]

Very nice, thanks very much. You really try to explain material for students using simple words while most of my professors just fall into narcissism trying to show their knowledge and cleverness

[@GideonTheTeacher]

When I was a student I suffered from the same problem. One adjunct professor came from the industry and was clear as day. That's why, as a matter of course, I add to my day job a weekly evening dedicated to face to face teaching.

[@GideonTheTeacher]

Thanks!

[@workhorseoeenanimal]

Allot of them do that shit, bunch of idiots, sometimes i think they just try make it more convoluted to make it harder for you. Bunch of assholes , haha. They not so smart when i start asking them questions tho , that's how you get those cunts.

[@danielherzig96]

I don't comment on videos, but you have done an amazing job with this one. The background sounds are relaxing as well. Thank you.

[@GideonTheTeacher]

Thank you for your kind words!

[@SomeshDKumar]

today I'm going to write midterm exam. I have missed the classes. my friend suggested that don't go through the DES, 3DES, AES algorithms that's eats time, but i decided to prepare this algorithms after seeing your videos. now i take a glance at William stallings book. thank you sir

[@jean-philippegmail7037]

Your video was the most complete and easy to undurstand I've seen in my searches about modern cryptography. I hope you'll continue videos like this.

[@everybodysfriend4789]

תודה רבה גדעון! הסרטונים על DES/AES מעניין ביותר, מוסבר בפשטות ובאופן ישיר. יישר כח על היוזמה האישית!

[@cvlatino328]

I have been reading books and articles about AES, but it was really hard to understand (specially cause I am not a native English speaker). But after watching your video, I have a better understanding of AES. Thanks for your time on this Gideon. Well explained and really easy to understand.

[@johncollinson8382]

Excellent presentation. Nice touch having the rain forest back drop!

[@hokiepokie]

Thanks Gideon! Your explanation is much more clear for me than the book my university prescribed. (Security in computing)

[@orojaz]

Excellent explanation Professor, I'm working on a project were I require to encrypt files back and forth and needed to understand the basics of AES, this was an excellent lesson, thanks a lot!

[@GideonTheTeacher]

Good to hear from you Omar. When I was a student, most of my teachers were lousy, so I appreciated one professor who made it all so clear. When I thanked him, he told me: "Don't thank me, pass it on, teach the next generation" which is what I say to you.

[@orojaz]

Sure I will Professor, indeed, while doing it so, I have experienced a rewarding feeling which comes spontaneously, is the same feeling that comes right after giving a present to an special person.

[@rohitpatil7836]

thank u sir. understood the concept of AES very easily.The language u use is also very simple to understand. God bless.

[@kikimitchell4108]

THIS IS AWESOME!!! ... I tried to figure that one out with my professor's slides at uni - not even close to how much I understood after watching this video ... ! Keep going please! ;)

[@santoshkumar-hy2sb]

I like the place and your interests of teaching way. This reminds me our when kids we were taught in this way which was awesome and joyfull.

[@carlosalarcon2737]

I like your lessons with nature..the combination of technology and nature is amazing !

[@michael7659]

Just passed Network+, starting Security+. Great presentation. I intend to view more of your videos. Thank you.

[@RR-nq1jb]

Thank you so much. I have watched the first few minutes, but i decided to say thank you before continue watching, since I really like your teaching style.

[@nl11406]

That is a fine overview. I'm glad I discovered these series.

[@tejpalsinghsiledar264]

Very beautifully explained!! Simple and elegant. Thank you very much Gideon.

[@jonathanlind5725]

Great video! much better explanation than what I've heard so far:) Thank you for that!

[@atineshsingh3382]

Seen Couple videos on KZbin for AES and thats the one that I was looking for. Very nicely explained thanks Gideon Samid for this video.

[@dotalabi]

Thank you sir for imparting knowledge, this has definitely made things clearer & added to the repository of information required for my exams next week.

[@PushpakDagade]

Thank you Sir for making this topic so easy to understand. I wish if everything else was made as simple. Also, I loved your idea of creating this video with nature in the backdrop. Amazing :-)

[@shreeyashrestha6777]

Hello Sir Thank you very much from the inner core of my heart. Your style is just awesome today in classroom i didn't get my teacher but i really got you. I am from small and beautiful country Nepal :) Nice to know you :)

[@GideonTheTeacher]

Thank you Shreeya, your words encourage me to do more. One day I may get to visit your beautiful country!

[@shreeyashrestha6777]

Gideon Samid OMG i cant believe in my eyes you replied me :) sure will be waiting for your visit :)

[@masoudamjadi9995]

This was really great, thank you Mr.Gideon, I learnt a lot.

[@meradabba]

This is extremely helpful. Thank you so much. A complex method explained in amazingly simple way.

[@TharinduWeerasinghe]

Really, the explanations are superb; lucid and palatable!! Thank you sir!

[@GideonTheTeacher]

Thanks, glad you like it. More to come!

[@trisnguyen4625]

simple to understand,,,best place to study from a mentor :)...Thank you for your work

[@GideonTheTeacher]

thanks!

[@GideonTheTeacher]

Thank you Tri for your comment, reminds me that it is worthwhile.

[@TheRoterdackel]

Very nice video! It helps a lot understanding the main process of AES :-) Thanks!

[@the_leonik]

Watch this in 2019, thank you, it's the best video which I found about AES explanation. Hello from Ukraine :)

[@GideonTheTeacher]

Good to hear a voice from the Ukraine -- you do need security!

[@meyou5409]

Amazingly good explanation! Thanks from Albania!

[@GideonTheTeacher]

+Me You Thank you Albanial. You keep me motivated!

[@MasticinaAkicta]

The amount of rounds reminds me of the enigma device. Multiple treatments lead to output that ought to be safe. Good explanations :)

[@shrikantkamble41]

hye Gideon ,this is so informative its real cleared of this AES Method once watch this video thank you so much.

[@StevenFeymann]

Very well explained - Thanks!!! it will help me a lot in my final exam

[@YTM4niac]

Thank you so much! As you explain it this way I have a feeling as I was sitting there with you :)

[@GideonTheTeacher]

Thank ou Piotr, this is one of the nicest comments I had!

[@tandonneeraj]

Excellent overview. Loved the way he explained box by box.

[@rechitsapivo]

Thank you. Great explanation. As far as cracking the AES, I think it's not a matter of some formula/decryption algorithm, but rather a matter of sheer computer power. The inner workings of AES are not complex so there is nothing special about them and no particular formula would be useful. It's their quantity that just makes it a mountain of work to attack. I think the designers found that there is great way to protect data by making it near impossible/very impractical to attack AES with currently available hardware. Most communications are not worth building a supercomputer center just to decrypt a message. The system is also scalable for future technological developments. From what you explained, I conclude that when quantum computing becomes a reality, then AES can be adjusted to be a mountain of work even for those computers.

[@samacumen]

Thanks Prof. Very well explained. Hope you are doing great.

[@AdityaKonarde]

I clapped along with the sound effects in the end. Best explanation ever :)

[@GideonTheTeacher]

I hear your clapping, thank you! Make good us of this knowledge!

[@MustafaQamarudDin]

I am glad he mentioned Quantum Computers at the End, Very Well Done ;)

[@GideonTheTeacher]

Thanks, check my latest lesson on Turing machine and computability.

[@MustafaQamarudDin]

Thank you, very well explained

[@jigishparikh1968]

Dear Prof, Great video. Thanks for uploading. @10:30, are you suggesting that substitution happens among those 16 bytes only. Meaning they swap positions among themselves? You mentioned Byte 2 replaced by Byte 147, but we only have 16 bytes to work with right? Please explain.

[@Akashsrivastav08]

What he is saying is that since 1 byte is of 8 bits, there are 256 total combinations of those 8 bits to form individual(unique) packs of bytes. So from the 256 possible combinations, some specific ones are chosen to replace the respective byte.

[@electronutlabs]

Thanks for this excellent overview. Very helpful to someone starting out on the subject.

[@MyAspnet]

Awesome! Keep doing this tutorials!

[@jeromejoel5759]

Thanks alot @Gideon! Loved your explanation!!! Cheers!

[@parisanaraei]

You are really awesome . Thank you for the videos . I am following them all.

[@GideonTheTeacher]

I am glad to read it, encourages me to do more.

[@BlueBluby]

THANK YOU, i wish you were my teacher at school.

[@blazstempelj7999]

A really nice and simple explanation. Thank you.

[@weetabixharry]

This is a superb explanation. Thank you so much.

[@lordhelmchen100]

Great explanation! Very interesting to watch!

[@atif7865]

Amazing, well explained, deserving of all the praise!

[@GideonTheTeacher]

Thank you quasar for your kind words.

[@Sara-mg9eo]

most helpful video of AES on KZbin ^_^

[@GideonTheTeacher]

+sara Thank you Sara, such comments keep me motivated to expand this crypto academy!

[@prakharjha7176]

you made it so simple to understand...awesome

[@n-o-i-d]

Thank you for sharing your knowledge with us, this video helped me tremendously.

[@TheSonofalich]

Great video! You explained it very well and this will help me a lot!

[@pranshudhankar2534]

Thank you so much for such a nice explanation Prof ............. can you also explain how the subkeys are generated ?

[@kristianadervishaj3897]

Very clear explanation , thank you :)

[@andrewsvega2023]

Thank you, thank you, thank you professor. I want to keep on learning from you. Do you have any other video where you can provide more information about the sub-key generator? Best Regards.

[@ralhamami]

Love this video. Fantastic explanation. :)

[@spencerleno]

Thanks very much! Amazing depth of information.

[@salahudeenamaosalah7897]

The Advanced encryption Standard is a well orchestrated cryptographic system of encryption , I have now understood in summary what AES . The big textbooks got from the library where quite confusing but with I will be able to refer to the text if I am to write an essay.

[@Tomyummmm]

Fantastic! so easy to understand and really aided in my project!

[@feeltheblissinhari]

Fantastic Sir! Awesome! Could you please tell more about the 2^8 bytes that you mentioned while explaining 128 bits of key size. I couldn't catch it really well. Thanks a lot! An awesome explanation!

[@tandonneeraj]

rsh It is for byte by byte substitution. Each byte has 8 bits so 2^8 combination. Much smaller than 2^32 for the final Substitution block.

[@RowanSheridan]

Thanks for the explanation. Is it a case of doing everything the opposite way for decryption?

[@tayfuncesur9221]

Thank you sir. It's the greatest explanation I've ever seen

[@GideonTheTeacher]

Thanks for your comment. Encourages me to put up more of the same.

[@rajmuscat]

Explanation really simple and understandable

[@prabhatalok86]

Superb explanation...

[@SomeshDKumar]

thank you very much sir. simple explanation easy to understand.

[@yashbhuva8515]

Dear Prof, Superb video. I want to ask one question that why specifically 10 rounds for 128 bits key size, same 12 rounds for 192 bits key size and 14 rounds for 256 bits key size ?

[@nemuchan200]

Thank you so much for your explanation :)

[@lusakulaadel5278]

Thank you for your explanation. Even though I don't know much about encryption, I did understand every think. However can you explain to me how the key generator works ?

[@Marwa4123]

Loved this, thank you very very much sir!

[@NazeerBashaShaik]

Thank you sir, a very clear explanation :)

[@adityachaurasia107]

Very good explanation .thank you

[@CamiloSanchez1979]

What an amazing explanation, thank you Sir. Subscribed!

[@kesavanarayana6257]

Hi Gideon Samid, could you please clarify my doubt. Why they have applied the XOR operation in between plain text and sub key. How they will extract sub key from the key?

[@Z3uS2]

Great video! Thank you.

[@tokunbohlapite8187]

Thank you so much Prof

[@PonsuyambuVelladurai]

Neat & Simple! Thanks much sir!

[@minoandrevski4552]

Play the video on x1.25

[@Sanketsj99999]

2x

[@Andrei-ds8qv]

thanks

[@tanmayeekulkarni4139]

Very Helpful..Thank u so much Sir!

[@abrahamgeorgec]

Very well explained!

[@stoudst]

Only question I have is on decryption. If the ciphertext was input as the plaintext and the same key was used, would it reveal the plaintext? If so, I don't inherently understand why that is true.

[@杨志钦-z2y]

Very very helpful, thank you!

[@bhimchawhan6034]

Nice explanation..

[@cirtey29]

Best video on AES on youtube

[@salhab76]

Thank you ... Excellent explanation..

[@sumit-kry]

Great.. simple and lucid explanation. Sir, can you explain Blowfish algorithm also or suggest some resources for easy explanation of it.. i'm having trouble understanding it.

[@GideonTheTeacher]

Thanks, will try to find time for it. I agree that most crypto texts are quite obscure!

[@noname-bu1ux]

These lctures are, as Tharundu Weerasinghe explained, superb, lucid and palatable. One question: The boxes are a metaphor right? Its just a mathematical metaphor, right? There are no physical boxes on machines used to process ciphers...Right?

[@noname-bu1ux]

Please someone reassure me and tell me I'm not crazy and that these boxes are just a visual device....

[@rima8583]

sure its a virtual box , there's no physical boxes . you're not crazy :)

[@noname-bu1ux]

Lol thank you.

[@kookiespace]

no name Dude...shouldn't it be obvious that it's metaphorical boxes? :| It's not a mathematical metaphor, it's just a way to make functions more explanatory to people that aren't programmers.

[@abdessalemabidi9117]

Thanks sir@gideon for this video I want to know how the AEs algorithm works with CBC mode of operation

[@visor617]

Will it not be a very big task if not impossible task for the adversary to replicate the same process just because of the 2nd round of substitution in all 10 rounds. So is it safe to say that Brute force and Man in The Middle attack is impossible?

[@Bielku]

Great lecture! Thank you!

[@luciankii9135]

that was so helpful for the course I'm taking so thank you so much

[@inadaizz]

Where was this video shot? It looks and sounds like paradise! It reminded me of the jungles of Belize. Sound more than look.

[@codebietnoi]

Awesome! thank you

[@jonaschristensen2295]

I am a bit confused about something. When Gideon says that the key is divided into subkey via mixing and multiplication, but what exactly does mixing mean? Also very good and helpfull video :)

[@AvihooI]

It's not being divided into a subkey, hence the input key is (at least) 128 bits and each subkey is of equal size. What happens is that numerous 128 bit (sub)keys are generated in a predictable manner from the original input key. Take a look at: en.wikipedia.org/wiki/Rijndael_key_schedule

[@jonaschristensen2295]

Thank you for the help :)

[@shahzebhaider971]

AES is a type of stream cipher so there are numerous key of size 128 bit(atleast) i think

[@carolina.mascitti]

Very helpful!

[@michaeleconomides4054]

The same process you examined (subs->trans->subs->xor) for one of the 10 rounds is repeated for all of them?

[@nitishshokeen1775]

Yes, it is repeated for all of the 10 rounds.

[@MegaProfessionnel]

sth i don't understand clearly is this 'XOR operation..... what does it really mean?

[@lovepontuskn]

You just earned a sibscriber :)

[@sanjeevsharma2985]

thank you so much sir, Awesome!!

[@yuvalharan7775]

thank you very much! explained very well

[@GideonTheTeacher]

***** You are welcome. I am glad you enjoyed it!

[@kookiespace]

Great Video. Thanks for that :)