- You should really mention more that the matrix multiplication (in mix columns) is not in normal arithmetic, but in Galois's finite field (2^8) arithmetic. Not just say "go look it up", because result with normal matrix multiplication are different. - And during key schedule you use Rcon(4) in first iteration, which is wrong. You should use number of iteration for the lookup, so Rcon(1). Visualize the XOR with only first byte, in order to be less confusive. Another iteration for next subkey is Rcon(2) in lookup table and so on. -- yeah, having rcon lookup table would also be better, rather than created vectors from the table. - Other things you are talking about are really clear and i am glad you dedicated time for making this helpful video, thanks!

Dear professor, thank you from Greece! Your guides are awesome and very in-depth and explanatory! Have a good day and thank you for the amazing content!

Thanks! Really helped alot. Learned more in this 12 mins than my whole semester

the only video that has really helped me understand AES!! thank you so much

Easiest explanation I've come across by far. Thanks Sir 💕

Easy to understand and nice animations. Thank you, sir

Thank you Shared! This short video really helped to understand the concept in simple way.

This is the best explanation to AES encryption standard out here

Tried to litterly find explanation how it works and only you explained the best way possible

hey professor i am 13 and i am trying to learn how to encrypt using the AES algorithm ,this helped a lot to understand the process thank you

Sir, I did love your video and I am just too young to understand your valuable speech as a 12 Years old. But still, I keep a large interest in Computer Science and Encryption Algorithms. Your lectures are really very much helpful. Thank you, sir!

Great overview! Thanks!

I am 12 trying to understand AES, this helped! Thank you!

thank you sir, animation is so helpful

Best ever explanation of AES! You deserve infinite likes Thank you so much ❤️ Sir!

loved your explanation! thanks so much

Great Explanation

Thanks a lot, your video is amazing! I hope you share us more video.

very helpful ,easily explained

Excellent presentation!

The video I wants I found here thanks sir what a great way to explain 😊☺️

Wow, great explanation 🎉

much more understandable and clear explanation rather than my classmate presentation

Excellent! Finally understood this!

Great video. I used the AES algorithm to encrypt and decrypt the contents of a hidden file that stored the password and username of sFTP server used to retrieve data.

Sir, u saved my life! thank u, sir! I hope i was a student of urs that would make me invincible

Thanks for this lesson. I have a question, what cipher mode is applicable in the AES encryption? By cipher mode, I meant something like ECB, CBC, CTM, GCM, etc.

At the end when the Round Keys are being determined from the cipher key, is this process the same regardless of the key size? I ask this because each 'key' is only 16-bytes (128-bits) so does that mean the process is slightly different for 24-byte (192-bits) and 32-byte (256-bit) keys?

How does XOR work on the round key step? can anyone explain?

Beautiful! very easy to understand even if I know nothing about cryptpgraphy. I want to aplly this so baaad

Thanks you, sir. This helped me a lot

Thanku sir,it was of great help

NIiiiiiiiiiiiiiiiceeeeeeeeeeeeeeee. Do not stop doing that, professor

Thanks. This video helped me alot.

great tutorial

a good video, i liked so much. Thank for doing this :)

this is exactly what I was looking for. thank you so much professor

Hope u share more videos like this

Very helpful. Thank you

Well explained. Thank you

Excellent !

Best video after I struggled on whole KZfaq video

Uh, well, with all due respect… NSA (part of DoD, obv) did not call for replacements to the DES or run the worldwide competition to select the algorithm to be selected to be designated as the Advanced Encryption Algorithm and incorporated into the Advanced Encryption Standard (FIPS 197). That completion was run by NIST, part of the Commerce Department. Now, NSA did decide that, at higher key lengths, when the algorithm is properly implemented, it would be sufficient to classified data up to TS. IMHO….

very good explanation

Amazing!

great video , sr thank you very much

thanks you so much, sir!

Hello thanks for the wonderful video. anything about padding?

Hi , thanks for the awseome video . i have on question at 9:41 . why you started rotating the bytes from the second row not from the first one .. is this how the AES works or i'm missing something ? Edit: in case someone is interested for the answer i searched and found that the first rows keep unchanged 🙂 have a good day everybody.

I love it jejejeje great !

I think there’s a mix up at 10:50, not XOR but just adding across

it helped alot

perfect!

Awesome 😎

Could you explain the MixColumns part. Where the matrix come from? And how to calculate to get result? Thank you.

Fantastic

What about decryption

انا مستغني عن ال 10%

can i get the code of AES?

solid

no explanation of what happen on each step.

Easy explained

It's a pity that you skip the MixColumns part in your otherwise excellent presentation. Also, looking up matrix multiplication is not the answer to understanding this step. Thanks for the video, and please consider explaining in detail the MixColums steps.

Shad the Lad

how about doing a decryption-explanation as well?

This is called learning and A professor was supposed to be like that. Do you have any python courses, Professor?

every body talks about steps in encryption, what about decryption?

Your description of MixColumns was awful. The rest was ok. Apparently a 128-bit key only provides 32-bit security since every single round key is derived from only 4-columns of which 1 is being reversibly obfuscated. It doesn't appear very secure. Figure out the obfuscated 32-bit column through brute-force, reverse the obfuscation and then finally recursively compute the other 3 key columns from the ciphertext, so that they propery match the result of the brute-forced column.

I met Rijmen irl

XOR is the key

😯

+1

Great Explanation