NETWORK SECURITY- AES (ADVANCED ENCRYPTION STANDARD) Algorithm

[@lifeisfun7391]

Wow! I wish Teachers like you could be in every college. Thank you Sir, keep up the good work:)

[@sundeepsaradhi]

hi thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel. feeling happy after watching your comment. keep on supporting our channel.

[@orlandoafrica8089]

Can u help solve this..... In the S-AES algorithm 8309 is the ciphertext, assume the key is 2D55. Determine the plaintext showing all steps

[@aliazlanaziz]

Important note: In the shift rows,circular left shift is done not circular right shift. Sir himself has verified this in comments but he didn't mark any annotation in the video. I am just writing it here so that who ever reads this correct him/herself. You can also check sir comments in replies below where he apologizes for his mistake. By the way your tutorials are nice sir.

[@maheshb3756]

Sir you have helped me a lot sir during my exams time. Your explonation is very goood and clear. Keep maintian that sir. You are one of the best teacher in my study career. I was scared about this subject and i found you on youtube. Now i learned lot of subject. Thank you very much sir.

[@CullyCulls]

Thanks Sundeep. You have created a wonderful Channel and a strong following.

[@aazramifham5581]

Thanks for explaining step by step and detailed process of AES algorithem...This video made my concept clear..

[@robertopizziol7459]

Really nicely explained! The only thing it's missing is the AES Key Expansion Algorithm. Thank you for your work :)

[@sundeepsaradhi]

hi roberto i will try to upload it soon. thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@pradipmalla8059]

Exactly I was wondering about it

[@beizhou2488]

Hi, thanks for the videos. In this tutorial, within the shift row operation, Row 1 should left shift 1 byte, not 1 bits according to the diagram you demonstrated.

[@redyhkhan]

One correction, In the shift Rows transformation of the round, the shift is by 1 byte and NOT one bit.

[@weekendprogrammer7545]

All your videos are very good crystal clear sir, thank you very much it helped a lot for my sem exams , wonderful job thank u once again .

[@sundeepsaradhi]

hi sandeep thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@elyali5493]

Sir thank you your tutorial is one of the best videos i come across in cryptography please continue with the great work

[@theNeuo13]

I would like to correct you on the Row Shift. It is to the LEFT not to the right. For the Decryption, it is to the right.

[@rajmestri8605]

sir, we use total of 44 words ..which means we have to undergo 11 rounds . i.e for k0=add round key and for k1-k10 = common rounds .....u have written only k1-k9 ........16:40 please correct it .....overall it was a great tutorial :)

[@sundeepsaradhi]

hi raj yes your are correct i have to write k1 - k10 thanks for observation and correction. i am sorry for my mistake.

[@davisosiemo9398]

Thanks for pointing that out Raj! I got a little confused but now it's all cool

[@sudharshaniyengar1587]

Very good explanation!! Just one point to be noted at @36:18 ..The rotation is Left Circular Shift.. Not a Right Circular Shift!! Again, thanks a lot for such insightful video!!!

[@utkanthsharma2804]

Thank you so much sir, it is indeed a boon to have you guide us with this cryptography stuff.

[@md.arifulislam1347]

Excellent explanation, Love the way of your teaching, lots of thanks and love

[@DollySingh-po3iu]

wonderful video sir..only one doubt i come across , how to expand the key?

[@syedshakeel2857]

Hi Sir, Your lectures are crystal clear, with a lot of patience and clarifying every doubts students have. I see in most of the lectures, you have covered the encryption part of the algorithm. It would be really nice if you could make some videos on the decryption of each of these algorithms too. That would be very helpful to understand the system end to end. So with an example, you could explain how some data is encrypted at the sender and gets de-crypted at the receiving end. Thank you.

[@sundeepsaradhi]

Hi syed Due to security issues I couldn't find the explanation even in single text book or net. So I didn't covered the decryption part. Thanks for your support towards our channel

[@mohammedmoinuddin7668]

Excellent video, clear explanation of concept. Good work.

[@utsv5226]

Sir, the bits are rotated circularly to the left. E.g: Row 3 ( 4 8 12 16 ) -> ( 16 4 8 12 )

[@sundeepsaradhi]

yes you are correct shift is based on row number

[@utsv5226]

it is left shifted no? in the video it is mentioned right shift

[@sundeepsaradhi]

Hi Utsav Das you are correct and it is left shift and nice observation and thanks for correction.

[@buzzfeedRED]

please mark the annotation in the video because every one not going through the comments

[@yeshwanthallampati9460]

Thanks Sir and Thanks Bro! Got doubt in the same area!!!

[@the.aravind.sankar]

Thank You Sir! Your videos helped a lot. Keep up the good work. I shared your videos among my friends.

[@sundeepsaradhi]

hi Aravind thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@the.aravind.sankar]

Sundeep Saradhi Kanthety Will sure do Sir.

[@adhithyaamal]

Hello sir ,we all are following ur lecture in this lockdown.

[@shivangigupta4458]

Sir, in the shift rows,circular left shift is done not circular right shift.Kindly verify!

[@RiyanshikaVideo]

hi, I researched and i came to know that its circular left shift.

[@prodigysonhiddenforareason1239]

@@RiyanshikaVideo great

[@TuanLe-uz2fb]

thank you

[@pronounceword]

I like your video very much. It's really great. I'll keep an eye on your channel. I am your fan and I will support you.

[@martinharris4416]

Wow amazing I would pay double fees if my colg had atleast one professor like you

[@dr.s.geethagascwcbecsdept3392]

Really wonderful explanation to complex AES algo.

[@ayush_sri]

You did a great job. Very Well Explained. Thanks!

[@rajashekarreddychirumani9681]

Your explanation was crystal clear and thanks for good explanation sir.

[@srivallimadduri1489]

Thank you for posting such a great content which helps us to learn n understand quickly

[@siddhardhakommineni7390]

Clearcut explanation . Thankyou sir

[@athisii_ekhe6167]

Thank you for the great effort and making it freely available.

[@captain-black-1]

Your efforts are great sir.

[@bhagyasreeakula3710]

Sir, ur explanation is so clear nd wow. We need BlowFish Algorithm too

[@brijpatel237]

Superb Sir!!...explanation was great, you saved my day!..Thanks

[@dr.sumathirajesh137]

Excellent sir. Thank you very much.

[@Shikharchaudhary007]

In substitution bytes, that 52 is in base 16 so it's technically 82 in base 10.

[@mabasthashm7268]

I love your way of explanation, it is very clear .. thanks a lottttttt . keep going .

[@stevewaltin8396]

One correction, in the shift row section of each round, each of the bits are shifted to the left by 0,1,2,3 bits. But a seriously well thought topic, thank you.

[@prabinmanandhar]

boosted

[@aparnahareeshkamala2998]

Good one . Nice explanation sir

[@sundeepsaradhi]

hi Aparna thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@jaithranotla3783]

Thank you so much sir❤️❤️ a very clear cut explanation, guys please watch this video don't skip because it's 49 mins, watch this you'll understand very clear all other videos are shit

[@Surya-xe2wu]

well explained but did you miss on Key Generation?

[@kooklekooki5161]

Very useful.....sir..... helps me a lot

[@sundeepsaradhi]

thank you

[@Soni-Santosh]

I think you are doing better than an IIT Professors and you are the best "believe me"

[@dayatube1]

Excellent Session.... Thank you very much.

[@habibullahnazari4426]

thank you sir it was great please arrange your video like number 1, then 2 .3 4.... which we learn by order perhaps some one don't know any more about network security from which video start to learn step by step thank you sir I hope be successfull

[@sundeepsaradhi]

hi habibullah thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@rajatchaurasia6592]

Great effort in teaching the algorithm. Your teaching technique is commendable sir!

[@prasannarentachintala5804]

Fabulous explanation sir... Thank u soo much for ur clear explanation sir...!!

[@umadevi7485]

Sir, your lectures are amazing !

[@sundeepsaradhi]

hi uma devi thanks for your interest towards our channel.

[@ramyasneha9921]

OMG.... Thank you so much sir... Your vedios were very helpful...😻🙏

[@poojarathi4146]

Very nice explanation.Thank you so much sir..!!

[@sundeepsaradhi]

hi pooja thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@VishnuVardhan-dc7rt]

.15:23 I think R-10 round takes K-10th key (total 11 keys from 0 to 10)

[@ManasKumarPanigrahi]

Nicely Explained Sir.

[@amrraouf3525]

Thank you very much, well explained...like your videos!!!!!!!!!!!....i love you videos.

[@sundeepsaradhi]

hi thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@teamteggi]

the shift is left not right and the no.of round depends upon the the key size.

[@l3arn3r]

Awesome explanation thousand thanks Dude !

[@sundeepsaradhi]

Hi Thank you for your support towards our channel share our channel with your friends and keep following our channel.

[@BugsBunny071]

Small correction at 15:58, round 10 has K10 only sir, you wrote K9. R2 has K2, R3 has K3 and R10 has K10.

[@RiyanshikaVideo]

yes ...it must be R10 and K10

[@interviewstrategiesbyankus1194]

Thank u for these brilliant lectures kindly give us the link to the computer printed pages too

[@sundeepsaradhi]

hi ankush thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel. sure i will plan for the hard copy of material too.

[@vaishakhkarunakarannambiar5733]

Wonderful effort..one minor suggestion- try to edit the video while you fill in the matrix to save time.. Found it very easy to understand the concept.. thanks for the good work..All the best..

[@kailasv1191]

Outstanding explanation..

[@sundeepsaradhi]

Hi Kailas thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@aiswarya3461]

Thank you so much sir. You made it in a way that every student can understand. One doubt ..........Sir, why do we neglect mix columns in the last round (10th round) ?

[@stevewaltin8396]

That is how the algorithm is designed.

[@suriyamanoharan8564]

Well explanation about AES algorithm. What about different modes in AES algorithm, like ECB, CBC, CTR, OCB, XTS. Please post videos regarding this, how to select proper AES algorithm.

[@udayposia8082]

Thanks for the Awesome Explanation.

[@gurugubellisaikumar7983]

Explain one problem sir in des and aes

[@marripatiusharani7146]

So useful very good explination sir upload more videos on AES algoritm

[@sunilreddymuppidi8475]

Sir, I scored good marks only by watching ur videos ..... Ur classes r so flexible to understand

[@SuneelKumar-un2wq]

Hello Sundeep. It's really very very good explanation. Recently I started learning this. But after watching your video, I learnt it one session itself.. thank you so much for this. I have two questions.. 1. what is meant by key.? How to get that? and how to extract 44 sub keys? 2. If plain text is not equals to 4 words, assume 17 bytes, then this AES-128 algorithm will work? If yes, how it can be?

[@sundeepsaradhi]

Hi suneel Thanks for your support towards our channel 1. Key is also some kind of text used in cipher text conversion. For generating subkeys there will some procedure to be followed. 2. If the plain text size is less than required then we are supposed to add 0s on left hand side of plain text. Hope your doubts have been clarified.

[@sudeeps9322]

@@sundeepsaradhi what about more than required

[@RaviKant-kp9fs]

Thanks a lot, it helped me during Mtech.

[@aswathyjayaram5235]

Nice explanation Sir. Thank you.

[@aminaleidehalherbawi654]

you teach with passion , thank you

[@s3oodfaisal]

Ok what about if i use 192 key how many words will be use each round , is it 4 also or 6 , if 6 that will be 192 bits size !!!

[@RTOSNMITCoreElective]

Thanks for the video, one doubt is is it circular right shift or circular left shift? Because arrows are shown towards the left.

[@lovelyyashu390]

Sir how the key was expanded to 44words,you havent tell how it happens and we are having add round key initially,in this also same steps want to follow like what you explained a?

[@ಮನುಗೌಡ-ಸ9ಣ]

Bro tat w(0,3) came as input to Round 1. So basically 1st Round starts with w(4,7) tats why Last round key is w(40,43)

[@nachutom]

Sir in Shiftrows, for each rounds is it 1 Bit right shift or 1 Byte Left Shift? When i observe the diagram in printed paper i have concluded it is 1Byte(not bit) Left Shift for round 1, simillarly for all other rounds. Thanks alot for the video sir !!

[@abhipatil417]

Great explanation sir... thank u!!

[@hajiralmshawit6819]

thank you very much good explaination

[@RiyanshikaVideo]

Very well explained. Sir I have a doubt.... why there are different S- Box values are available on internet , if you are saying these values are predefined ???

[@nikhilt3755]

see his des algorithm video

[@Maulikchaudhary]

Thank you sir...for this detail and Best explanation

[@ameeran1059]

Well explanation sir....Thanking youuu☺

[@JagdishKumar-ky1no]

Super duper explanation.

[@technicalmilan895]

I understand it easily.. Thank you sir..

[@sundeepsaradhi]

hi Chakre thanks for watching my sessions and supporting our channel. keep following our channel.

[@vidhipatel4869]

Thank you for nice explanation 😊

[@lailazahra3469]

thanx sir it's gorgeous explanation...

[@jayawantkarale993]

Really good explanation sir s box input 16*16 matrix values are predefined

[@bommepallinarayanareddy1879]

Thank you so much sir.....

[@foreverlearner3397]

Sir, here you are using a different s-box. Do we need to calculate s- box each time or it is fixed? Because in the book there is a different s-box.

[@sundeepsaradhi]

hi i had shown the s-box which i refered from william stallings text book and which book you have refered and were you find the difference. plz let me know so that we can correct the viewers.

[@foreverlearner3397]

Sir, mine is also from William stallings book 5th edition.

[@pavant8761]

Sir.... last R10 can contains subkey K10 only know Sir. .. Kindly clarify

[@sundeepsaradhi]

Hi Yes you are correct

[@pamilad5473]

Sir...similarly, pls give the explanation for AES-256

[@black-x98]

Your videos are awesome!

[@arsal_malik0]

Good Effort Sir❤

[@sankadharmapala4064]

amazing explanation. thank you.

[@hassansyed5661]

Thank you for your explanation in easy words

[@sundeepsaradhi]

hi Hassan Syed thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@kartikeyamohan7824]

Thank you Sir Great Explanation

[@sarezh9068]

many thanks :) keep up the good work

[@WaseemAhmad-ie4hh]

can i use aes for information hiding .is a best algo or choose another.....??? plz reply and nice explanation..

[@sundeepsaradhi]

hi waseem Information hiding is called stegnography and here AES algorithm is only used to keep our message secret by converting into cipher text. Hope your doubt has been clarified.

[@WaseemAhmad-ie4hh]

ok thnks

[@jpsnagi]

Nice work explaining the methodology Sundeep. You should look into adding this as a course on Udemy, and make some money. :) I needed a refresher, as it has been more than 10 years since I did this stuff. :) I vaguely recall that the key also changes in each round, with a lookup function, doesn't it? And usage of key changes (how it is expanded) and number of rounds change too for AES 192 (which has 192-bit key and 12 rounds) and AES 256 (which has 256-bit key and 14 rounds).

[@sheeba123raj]

good explanation sir.one doubt how we get the predefined 4×4 matrix .thank you

[@sundeepsaradhi]

hi sheeba as i said that matrix is predefined means we have use the same in the algorithm.( just like formula) thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@pavant8761]

Sir in input array , is it each cell represent 1 byte or each column? If each cell means in total it gives 16bytes=128bits. Kindly clarify.

[@sundeepsaradhi]

Hi Here each column is represented with 1 Byte.

[@umairkhan4982]

Great Explanation Thanks (y)

[@ananthusriram8156]

Super .....thank-you sir

[@narayan143100]

Thanks for your videos sir.

[@sundeepsaradhi]

hi srihari thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@vaishnavi353]

Thank you so much. Really helped me a lot.