S-DES Encryption || Simplified data encryption standard(S-DES) || - Encryption & Decryption

[@lecturesbyshreedarshank8977]

I have published " Bharatiya Katha Vaibhava Vol 1 and Vol 2" books for children. For details, orders check the telegram link:
t.me/joinchat/bv4e2-mQrCtkZjI9

[@asdfghjklzxc2222]

अज्ञान तिमिरान्धस्य ज्ञानाञ्जन शलाकया । चक्षुरुन्मीलितं येन तस्मै श्री गुरवे नमः ॥
Thanks sir for your valuable efforts!

[@omaewamushinderu]

big thnx from russia, i will to write exam tomorrow, u helped me

[@lecturesbyshreedarshank8977]

Thanks 😊

[@ayeshaali903]

Sir, Thank you so much for part 1 and 2. Thanking you is just not enough honestly! Super amazing explanation!

[@lecturesbyshreedarshank8977]

Thanks...Do share and subscribe

[@madhurjyadeka5569]

A very concise and standard explanation.
Thank you

[@_prof.paradox_]

Clear explanation. A really good lecture. Thank you, Sir.

[@lecturesbyshreedarshank8977]

Thanks...

[@smashinu2]

you're an encryption god, thanks a lot for helping me understand this concept. subscribed.

[@lecturesbyshreedarshank8977]

Am really glad it helped u.. Thanks :)

[@programmers8245]

You are the best thanks alot

[@lecturesbyshreedarshank8977]

Thanks 😊

[@saurabhpatil2529]

Thank You sir

[@rahulsingh40g]

Video quality was excellent in terms of understanding the concept. Thankyou so much sir,
But kindly improve over sound and video quality, it's much needed.

[@lecturesbyshreedarshank8977]

True.. the later videos are much better ..Thanks for the feedback.. These were the first set of video lectures.. check out the Decryption for s-DES done recently.. ua-cam.com/video/HDg9qxCfj3c/v-deo.html

[@samayakmalhotra3040]

Lovely Explanation

[@lecturesbyshreedarshank8977]

Thanks..Do share and subscribe

[@bhavikjinjala980]

nice explanation

[@swarnas2313]

Nice explanation sir. Thank you very much !!

[@robertnyirenda64]

Thank you so much you really helped

[@lecturesbyshreedarshank8977]

Glad to know..:)

[@manmohan_pundir]

Great🤗

[@lecturesbyshreedarshank8977]

Thanks.. Do like and subscribe..

[@koushiksarma2613]

Thanks a lot sir !

[@jitenkhatri8001]

Thank you so much sir

[@geshbenrewand1778]

God bless you

[@lecturesbyshreedarshank8977]

Do like and subscribe

[@geshbenrewand1778]

Yup

[@АртёмКалинин-ц5о]

От души, мужик

[@sripriyasrinivasan3796]

Great explaination! Thanks!!

[@lecturesbyshreedarshank8977]

Thanks

[@lecturesbyshreedarshank8977]

I am delighted to inform you all that i have authored a book of stories for children titled: " Bharatiya Katha Vaibhava -1".
The book was released for Deepavali.
This book features 25 unique and popular short Stories with beautiful illustrations from our Epics, and from the life of our Saints, Sages, and Rulers...
This is indeed a wonderful gift for children especially to be given as a prize for competitions! You can order in bulk too. Orders are welcome for libraries, schools etc..
Please note that Ebook kindle versions and paperback versions [B&W illustrations] can be bought online..
Find the links..
Zorba Store:- www.zorbabooks.com/store/children/bharatiya-katha-vaibhava-1-stories-for-children/
Amazon (outside India) : www.amazon.com/Bharatiya-Katha-Vaibhava-SHREEDARSHAN-K-ebook/dp/B08N53PM3B/
Amazon Kindle:- www.amazon.in/dp/B08N53PM3B
Note: To buy the full colour version book (paperback with colour illustrations) please contact the author , as they are only being printed at the author's request. The discounted price of the full colour version book is Rs 300/-.
Those who wish to avail of this offer, please contact/message me.(Especially if you want a full colour version book, please inform at the earliest..)
For bulk orders and discounts on B&W version and for colour version books you can contact ...
Email: [e-mail]
/ [e-mail]
Regards,
Shreedarshan K (Author)

[@hafsafarooqi9022]

From where we get the values of S0 and S1 matrix? Are they given?

[@saharshithasa]

🔥🔥🔥🔥

[@darrirro]

I wish my teacher taught like this

[@lecturesbyshreedarshank8977]

Thanks. 😊
Please do like, share And subscribe..

[@nitish7764]

Thank you 💕

[@lakshitpardeshi4382]

In round 2 won't the left and right bits swap?

[@vishalparmar988]

Nice Explanation Sir ,, Keep doing it ,, and make more videos 🙏👌

[@lecturesbyshreedarshank8977]

Thanks..
Do share and subscribe..

[@eichikionizuka6773]

T CHO MEC ! Merci

[@brucemclaren-]

This video just saved my ass negl

[@mihirkumar3805]

Hey! You forgot to swap on case of round two

[@lecturesbyshreedarshank8977]

There is no swapping after round 2...

[@rishabhsharma8499]

do we skip swap in fk2?

[@nadegecadorin2507]

Hey, I have to encrypt and decrypt with S-DES the letter A, but I don't understand how. Can you explain please ? Thank you

[@lecturesbyshreedarshank8977]

One way is to consider ASCII code for A and it's equivalent 8 bit binary representation... Use any 10 bit key and perform Encryption and Decryption...

[@nadegecadorin2507]

@@lecturesbyshreedarshank8977 Okay I did the encryption thank you !! But i don't know how to do the descryption... :/

[@lecturesbyshreedarshank8977]

@@nadegecadorin2507 Please watch my video on s-DES decryption.. ua-cam.com/video/HDg9qxCfj3c/v-deo.html

[@saibalaji4713]

Hello sir what should I do if the key given in question is 8 bit instead of 10 bit

[@lecturesbyshreedarshank8977]

Then they would have given the sub keys k1 and k2 .. you can continue with encryption/decryption directly...

[@sumanpatil88]

Wheather IP Inverse is given in the question? If not how to calculate?

[@lecturesbyshreedarshank8977]

Usually it will be given in the question..

[@kavanamgowda879]

Can I get the algorithm of this sir , please

[@lecturesbyshreedarshank8977]

i have explained the process of encryption.. please specify...

[@pokemongo8317]

Sir perform decryption also sir there is no video regarding decryption 😢

[@lecturesbyshreedarshank8977]

Sure ..shortly

[@pokemongo8317]

@@lecturesbyshreedarshank8977 thank you sir....for aes also

[@lecturesbyshreedarshank8977]

s-DES Decryption : ua-cam.com/video/HDg9qxCfj3c/v-deo.html

[@saqlainramzan6640]

will IP given in question ?

[@lecturesbyshreedarshank8977]

It depends .. If not you may have to remember..

[@abhisheks9906]

at 18:30 min. , swapping is not done .Is it right ..?, Please explain

[@lecturesbyshreedarshank8977]

Yes absolutely... After fk2, there is no swapping... Swapping is done only once after the 1st round of operation fk1. Hope it clears your doubt...

[@ravikiranmutta1124]

how r value taken

[@lecturesbyshreedarshank8977]

Which values?

[@ravikiranmutta1124]

@@lecturesbyshreedarshank8977 that means you take s0 and S1 matrices
How that values came sir...

[@v.deepthisree4844]

is the s0 and s1 box fixed?how did we get those values in the boxes

[@lecturesbyshreedarshank8977]

Yes, it's fixed

[@srivyshnavi6271]

Please explain decryption

[@lecturesbyshreedarshank8977]

Decryption process is the same as encryption except that the subkeys are used in reverse order...

[@adityaband6919]

@@lecturesbyshreedarshank8977 thanks sir

[@aisakyunhotahai8130]

Sir, in the last row of S-box 0, we have no zero, is that a mistake or it is like this only?

[@lecturesbyshreedarshank8977]

That is how it is defined... It is correct...

[@aisakyunhotahai8130]

@@lecturesbyshreedarshank8977 Thankyou sir

[@syedeshaa695]

Very well explained. But where is decryption process?

[@lecturesbyshreedarshank8977]

The process of decryption is the reverse of encryption where the subkeys are used in reverse order...

[@nan6962]

did not cover decryption?

[@lecturesbyshreedarshank8977]

s DES Decryption : ua-cam.com/video/HDg9qxCfj3c/v-deo.html

[@abdifatahmohamed8600]

This sequences are chosen randomly or are like never to be changed?

[@lecturesbyshreedarshank8977]

Which sequences?
U mean Permutation P sequences?

[@abdifatahmohamed8600]

@@lecturesbyshreedarshank8977 Yah.... like 26314857 and 41232341 and the others

[@lecturesbyshreedarshank8977]

@@abdifatahmohamed8600 they are fixed ! ... These sequences are chosen while designing the algorithm such that encryption and decryption are absolutely reversible...

[@abdifatahmohamed8600]

@@lecturesbyshreedarshank8977 Thank you... You've cleared all my doubts

[@prabuddhadurge4114]

@@lecturesbyshreedarshank8977 Then it should not be called as Permutation, it should be called arrangement! isn't it Sir. correct me if I am going wrong.

[@soldierdeepika]

The number sequence you are taking was fixed like 2 6 3 1 4 8 5 7 or we can change sir

[@lecturesbyshreedarshank8977]

All Permutation sequences and (IP)-1 are all fixed...