0:10 - Intro 2:15 - Explanation 4:10 - Electronic Code Book Mode 7:15 - Cipher Block Chaining Mode 12:25 - Output Feedback Mode 19:55 - Cipher Feedback Mode 22:50 - Counter Mode

I've been watching your videos throughout my Computer Security course and I trully thank you for helping me a lot in understanding the topics more!!

I was racking my brain how to complete this chapter! Thank god! I found you on KZfaq!

This is what I would call a perfect tutorial...Great Work👍 and thank you

It's not an exaggeration to say that ur explanation is crystal clear..

Thank you it is helped me a lot during this quarantine time to understand this chapter nicely !

Thank you soo much sir ..... Couldn't imagine of passing CNS without your videos .. :-)

Really a very helpful video!!! much respect for you , from Nepal!!

Just too Good Sir....No words for you....Grand salute to your explanation....So many thanks sir :)

I just wrote my data network exam today and it went well because of you sir. Thank you so much.

Very well explained! Loved it.

Thank You very much Sir for discuss all the Block Cipher Modes elaborately. It's very helpful.

Explained so well! Thank you

Fantastic explanation Sundeep garu . Many thanks for taking time and sharing your knowledge .

All your videos are really helpful .Explanation is very clear and effective. Thankyou so much for your efforts sir

Sir i can't understand this topic from our professor and after watching this video i can understand clearly all videos related to network security, playlist is very easy to understand, thank you so much

Sir you are too good...The way you teach is so amazing...Each time when iam in need of some topics I first find your video and just when it's there I feel like the topic is done... Thankyou So much ..Ua videos are so helpful sir ...Plz always teach us like this only...

Thank you..... Awesome... Simple, clear, concise and precise...

you helped a lot for my exams thanks :-)

Thanks sir,your sessions are very nice,and you would have explained very well.

Thank you sir you made this complex topic to be understood in a very easy way.

Best explaination...Thank you so much Sir..!!👍👍👍

Insane explanation 👏

sir,because of you wrote exam very well . thank you so much sir,

really helpful for my MS. didnt need to open textbook at all.

thak you so much sir. I see every vdo of u. Network security topics when i see in book, it feels like i am not getting a singl word. But once i see a single vdo of u, i feel very satisfied with that topic. Thank you sir. U r doing a grt job. Keep it up and u will keep getting more blessings. God bless u.

Thank you. Really good explanation.

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.

Sir you are amazing , i have written exam very well because of u

You made this interesting. Thanks

Last-minute prep for exams :). So methodically explained!

Prepaing for an exam a night before. And, damn, your videos are awesome. Thank you)

Super sir, all concepts are clearly understand. thank you sir

Great explanation, thanks)

Well done...slow phase explanation....keep it up..thanks

VERY MUCH USEFUL PROFESSOR

Good explanation. At the university we had to make a block cipher written in python, they are fun to write and recommend anyone in the security field to write one to gain a good understanding of them.

Thank god..... Next week , i have exam ... And i really didn't wanted to waste the hours on this topic.. Thanku so much..👍👍😊

Really a very helpful video sir .. thank u Soo much

Your hand writing is amazing

Excellent work 👌

Your intro made me low my lappy volume and your voice made me increase the volume.

You helps a lot sir♥♥

Thank u so much sir for giving us your precious time ❤️

Easy for someone to explain it when they understand it well!

Thank you sir!

Great job

Greatly explained

Clearly explained❤️❤️❤️

nyce explination ..Thanx u soo mch Sir

Thanks alot... awesome explanation

1. Don't you lose the 64 - S bits by considering only S bits? 2. In the first step of the shift register, how can you select only S bits? That means during the entire encryption process you will work with S bits.

thank you sir awesome teaching

Thank you 😊😊😊😊

you are just amazing

Tq you sir for your precious time and valuable explanation

if u are the professor teaching us, no one in the class will fail !

Superb sir... Tq very much Sir.. 😍😍😍😍😍😍 ....

good day Sir. plz give simple example for block and stream ciphers. your explanation is awesome .

I think there has been a confusion between CFB and OFB , OFB mode operates on full blocks of plaintext and cipher text not on s-bit set while CFB operates on s-bit. Thank you by the way, your videos are very helpful.

I want in telugu languge brooo U r explaintion is excellent I want more clear languge so if u can say in telugu that is more useful me and my frds too

Very well explained sir

Thank you sir.

Thank you very much sir

Nice one sir!

thanks a lot sir

Thank u so much sir

Good explanation sir

Great!

thanku very much

The way of expression is very interesting ,but what i want to say please take simple plain text as sample message and show how divide the message into block and how we Apply the encryption process!!!

Thank You sir 😇😇

Great🙏🙏❤️

No idea what this is about, but liking anyway

Good work sir

Hello Sir, thank you for this video. I loved watching as I understood. I would like to know why for the encryption, the algorithm can't just take the entire plain text in order to transform it into ciphertext? In order words, why does it have to always size the plain text in some fixes blocs? And also, what happens when the last plain text size is inferior to the fixed block size? Does the ciphertext will still remain with the same length? Thank you again and hopefully, I will find answers.

Dear Sundeep, Very well explained. Can you please help me understanding AES CCM mode of operation?

Are you God?

Great work indeed.Sir,i need help in RC6 algorithm.Kindly help me.

good lectures

Thank u sir

great

Sandeep very well taught , I had a small doubt in output rate cipher when we have N of block you said counter+N -1 why we have used -1 what it means. Please reply..

Propagating Cipher Block Chaining(PCBC) encryption is given by the equation- Cn=E(k,[Cn-1 XOR Pn-1 XOR Pn] Find out the decryption equation and draw neat figure for both encryption and decryption.(P0 can be considered as NULL). PLEASE SIR GIVE ME THE SOLUTION OF THIS QUESTION AS SOON AS POSSIBLE.

please give some examples of each it makes easy understanding

hello sir. bit of confusion regarding OFB. 64 bits of plaintext or 64bits of initialization value? BTW, I am from Bangladesh. And your videos are awesome👌.

Sir please upload a video on International Data Encryption Algorithm

THANK YOU VERY MUCH.BUT WHAT IS THE PURPOSE OF INITIAL VECTOR

👌👌👌👌

Super sir

I think you have forgotten to add this video in your network security playlist.

Sir I have one doubt i.e. You have taken plain text as s-bits it means 8bits, now what is the cipher text size, is it 8bits or 64 bits, if cipher text is 8bits how can we give to the next bock as 64-s and s-bits...

Meaning of Guru -- Sandeep saradhi 🤗

Hi Sir....the class was very very good....however can you please make one video and explain by giving one example ....for eg....take a plain text 110011001000101010101 or something like this and an IV 110001010 and then show us how to encrypt using each mode of block cipher...that would be very very helpful.....this is a request and i have not found it anywhere...

Sir can you please make a video on frequency analysis of simple substitution cipher

Why we are applying encryption algorithm itself in decryption in ofb?

In the output feedback mode, where do the shift register come from?

In chiper block chaining. is the first IV decryption must same with the first IV encryption? please answer me

What is counter value? Is it group of bits?

Sir! What is counter value. Y we have to choose that in counter mode ?