AES IV - Advanced Encryption Standard - Encryption and Decryption - Cyber Security CSE4003

In this lecture we will be learning
1. The steps inside each round in AES
2. How AES Decryption is performed.

[@JohnWickXD]

We need more teachers like you Sir😇

[@randeerlalanga]

Thank you so much for this video series, Well explained with practical examples. Thank you, sir.

[@vaibhavvm4147]

Amazing explanation!! Thanks a lot

[@SatishCJ]

Glad you liked it

[@jaithranotla3783]

Thank you so much for these two videos.. very clear explanation with example loved your video ❤️

[@Intisam_here]

Thanks Alot you make my day Huge respect from University of Management and Technology Lahore pakistan

[@SatishCJ]

Glad to know the lecture helped. Thanks for the nice feedback!!

[@hassanzafar5188]

Well explained with practical example !

[@puturavindrawiguna3025]

thank you, this is a very clear explanation with written calculations of all needed scenario to understand the AES, thank you very much

[@SatishCJ]

Glad to know the video helped. Thanks for the nice feedback

[@kiirnyok6736]

Thanks a lot sir, AES was really hard for me to understand but i understood it now!

[@SatishCJ]

Most welcome!

[@ibrahimtanvir1923]

Thank you Sir. You clear all my doubts regarding mix columns.

[@SatishCJ]

You are most welcome

[@ExploreWithAashay]

Such a nice and proper explanation ...😍❤

[@SatishCJ]

Glad you liked it

[@osamabzour8542]

Thank you man, you mad my day, I'll pray for you!

[@donnalyntopacio8785]

thankyou so much sir, now I understand na the mix columns in aes.. THANKYOUUUUUUU 😀

[@SatishCJ]

Glad to know the lecture helped. Thanks for the feedback

[@suryapandey3905]

Very elaborate explanation. Thank you sir.

[@aaronl8443]

Again thank you for the great lecture!

[@SatishCJ]

Glad you enjoyed it!

[@kunalsoni7681]

this video is really helpful so much 😊💚

[@AbdulWahab-by1cu]

Can you tell me when we need to use irredicval polynomial, in every step or when we're in state of x8.

[@cocomoadventure9722]

Thank k last day pe ap k vedio ne kmal kr diya

[@harikishoreable1]

Thank you for the video. Easily understandable.

[@lokeshbudhia8806]

Sir, why that particular irreducible polynomial is used?

[@asharneyaz7]

Sir, at video length 2:31, there is a mistake in the matrix value when the message and key XOR operation was done. In the 3rd column last element, it should be 08 instead of 0f.

[@aragonarathon2066]

Well explained, thank you

[@AbdulWahab-by1cu]

And one more thing is, if we are using the irredicval polynomial the value of the polynomial can same

[@krishnakishore7577]

Sir, It's very clear, Can I get PPT For AES ALGORITHM including round steps

[@Poojasrinivas26]

Nice sir ,do another vedio how the add round key will work take allready substituted values

[@soly8354]

Thank you! Very clear and to the point.

[@fatimagull2429]

Thankyou, Very well explained. 💯 💯

[@kitgtm8203]

Great Sathish Sir,Ur humble and great teacher 🙏

[@blorb112]

When you get a irreducible polynomial, does p(x) always result in x^8+x^4+x^3+x+1 ?

[@aragonarathon2066]

Yes, when your output in mixColumns is greater than x^7 you need to use a irreducible polynomial, and the exact one you stated in your comment is intended to be used as said by the aes developers

[@EshaMalik-w1f]

​@@aragonarathon2066
thank

[@pranavmahalpure6457]

thank you sir

[@ganeshreddy5939]

will you lecture this clearly in vit though..

[@aswiniv3516]

Really helped a lot, thank you so much sir

[@yugashmita_crafts]

Sir can you make one video on bilinear pairing

[@SatishCJ]

Sure.. I will try 👍

[@muhammaduseram9405]

I have confusion that on what basis p(x) value is taken?

[@sabahatishfaq3236]

Sir ap ny kis trh P(x) ki value x^8+x^4+x^3+x+1 li hai

[@md.shadab7208]

Ye tumhe provided hoga, tumhe nikalne ka jarurat nahi

[@genatto]

Thanks sir

[@elambharathithangavel2254]

very helpful

[@SatishCJ]

Glad to hear that

[@madarakamarco]

i finally master it you good lecture

[@ericzuckerburg6292]

Thank you very much again.

[@waqasahmed-fy6tp]

Very nice

[@thenekish1]

You saved me! Thank you!

[@urwamaryam7725]

After going through the whole encryption and decryption cycle of AES. I have 2 questions in my mind.
Question 1
Why initial transformation is performed? Like we are just XORing the round 0 key with input vector. Why not going through the whole transformation steps?
Question 2
Why the last round in encryption and decryption has mix columns step missing?
What's the logic behind the difference in these rounds from other rounds?
Can you just brief on these?

[@bilaljani5534]

Thank you very much ❤️

[@sengathirAbala]

great video!!!

[@leonardchola1777]

How did you get 81??

[@jaithranotla3783]

You are god❤️

[@SatishCJ]

I am just a beginner. Got a lot more things to learn . Thanks for the appreciation 👍

[@tamara8153]

Thank you very much, can you send me this pdf example

[@09lavakrishna42]

how to write irreducible polynomial sir i.e p(x)??

[@tejaskumar9057]

isnt that a fixed polynomial--> x^8+x^4+x^3+x+1

[@ed1849x]

Thanks!

[@sharvilpatil8742]

Thanks a lot!

[@amirabozaid5457]

Greaaaaaaaaat

[@sirinshania32]

7:55 HI !! can someone explan to me how to calculate = 81

[@revanthnmallol9842]

It's r1 not 81