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.

[@jaithranotla3783]

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

[@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!

[@vaibhavvm4147]

Amazing explanation!! Thanks a lot

[@shinigami-R]

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 !

[@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

[@aaronl8443]

Again thank you for the great lecture!

[@SatishCJ]

Glad you enjoyed it!

[@kunalsoni7681]

this video is really helpful so much 😊💚

[@suryapandey3905]

Very elaborate explanation. Thank you sir.

[@harikishoreable1]

Thank you for the video. Easily understandable.

[@cocomoadventure9722]

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

[@kitgtm8203]

Great Sathish Sir,Ur humble and great teacher 🙏

[@soly8354]

Thank you! Very clear and to the point.

[@fatimagull2429]

Thankyou, Very well explained. 💯 💯

[@AbdulWahab-by1cu]

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

[@aragonarathon2066]

Well explained, thank you

[@AbdulWahab-by1cu]

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

[@aswiniv3516]

Really helped a lot, thank you so much sir

[@pranavmahalpure6457]

thank you sir

[@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.

[@lokeshbudhia8806]

Sir, why that particular irreducible polynomial is used?

[@Poojasrinivas26]

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

[@madarakamarco]

i finally master it you good lecture

[@ericzuckerburg6292]

Thank you very much again.

[@thenekish1]

You saved me! Thank you!

[@krishnakishore7577]

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

[@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

[@jaithranotla3783]

You are god❤️

[@SatishCJ]

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

[@elambharathithangavel2254]

very helpful

[@SatishCJ]

Glad to hear that

[@genatto]

Thanks sir

[@sengathirAbala]

great video!!!

[@bilaljani5534]

Thank you very much ❤️

[@waqasahmed-fy6tp]

Very nice

[@sharvilpatil8742]

Thanks a lot!

[@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

[@muhammaduseram9405]

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

[@ed1849x]

Thanks!

[@amirabozaid5457]

Greaaaaaaaaat

[@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?

[@yugashmita_charms]

Sir can you make one video on bilinear pairing

[@SatishCJ]

Sure.. I will try 👍

[@leonardchola1777]

How did you get 81??

[@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

[@sirinshania32]

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

[@revanthnmallol9842]

It's r1 not 81