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

S-DES Encryption || Simplified data encryption standard(S-DES) || - Encryption Algorithm explained with an example
1] s-DES Key Generation: • S-DES Encryption || Si...
2] s-DES Encryption : • S-DES Encryption || Si...
3] s-DES Decryption : • S - DES Decryption ||...
#Cryptography #SDES #Encryption #Decryption #SDES #DataEncryptionStandard #sBox #Confusion #Diffusion #Cipher #SymmetricCipher #cybersecurity
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𝐁𝐨𝐨𝐤𝐬 𝐈 𝐡𝐚𝐯𝐞 𝐚𝐮𝐭𝐡𝐨𝐫𝐞𝐝:
𝐁𝐡𝐚𝐫𝐚𝐭𝐢𝐲𝐚 𝐊𝐚𝐭𝐡𝐚 𝐕𝐚𝐢𝐛𝐡𝐚𝐯𝐚 - 𝐕𝐨𝐥 𝟏 , 𝟐 , 𝟑 , 𝟒
𝐅𝐨𝐫 𝐛𝐮𝐥𝐤 𝐨𝐫𝐝𝐞𝐫𝐬 𝐚𝐧𝐝 𝐝𝐢𝐬𝐜𝐨𝐮𝐧𝐭𝐬 𝐃𝐌
𝐄𝐦𝐚𝐢𝐥 : 𝐞𝐝𝐮𝐦𝐢𝐭𝐫𝟒𝐮@𝐠𝐦𝐚𝐢𝐥.𝐜𝐨𝐦
𝐓𝐨 𝐛𝐮𝐲 𝐛𝐨𝐨𝐤𝐬 𝐨𝐧 𝐀𝐦𝐚𝐳𝐨𝐧:
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𝐌𝐲 𝐒𝐨𝐜𝐢𝐚𝐥 𝐌𝐞𝐝𝐢𝐚 𝐇𝐚𝐧𝐝𝐥𝐞𝐬
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📚 𝐈𝐦𝐩𝐨𝐫𝐭𝐚𝐧𝐭 𝐂𝐨𝐮𝐫𝐬𝐞 𝐏𝐥𝐚𝐲𝐥𝐢𝐬𝐭 📚
𝟏] 𝐂𝐫𝐲𝐩𝐭𝐨𝐠𝐫𝐚𝐩𝐡𝐲 : tinyurl.com/3pjs2tnd
𝟐] 𝐃𝐢𝐠𝐢𝐭𝐚𝐥 𝐄𝐥𝐞𝐜𝐭𝐫𝐨𝐧𝐢𝐜𝐬 : tinyurl.com/bdfwbsrk
𝟑] 𝐄𝐥𝐞𝐜𝐭𝐫𝐨𝐧𝐢𝐜𝐬 (𝟏𝐬𝐭 𝐘𝐞𝐚𝐫 - 𝐁𝐚𝐬𝐢𝐜) : tinyurl.com/3vduy32b
𝟒] 𝐄𝐫𝐫𝐨𝐫 𝐂𝐨𝐧𝐭𝐫𝐨𝐥 𝐂𝐨𝐝𝐢𝐧𝐠 : tinyurl.com/4wpr8dew
𝟓] 𝐃𝐢𝐬𝐜𝐫𝐞𝐭𝐞 𝐌𝐚𝐭𝐡𝐞𝐦𝐚𝐭𝐢𝐜𝐬 : tinyurl.com/2p94dyr2
𝟔] 𝐂𝐥𝐚𝐬𝐬 𝟏𝟎 - [𝐂𝐁𝐒𝐄/𝐍𝐂𝐄𝐑𝐓] 𝐌𝐚𝐭𝐡𝐞𝐦𝐚𝐭𝐢𝐜𝐬: tinyurl.com/kbdb5syw
𝟕] 𝐒𝐢𝐠𝐧𝐚𝐥𝐬 𝐚𝐧𝐝 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 : tinyurl.com/2p8bkpf9
𝟖] 𝐂𝐨𝐧𝐭𝐫𝐨𝐥 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 : tinyurl.com/2p9hbn6m
𝟗] 𝐋𝐢𝐧𝐞𝐚𝐫 𝐀𝐥𝐠𝐞𝐛𝐫𝐚 : tinyurl.com/2p8nswjw
𝟏𝟎] 𝐂𝐥𝐚𝐬𝐬 𝟏𝟐 - 𝐌𝐚𝐭𝐡𝐞𝐦𝐚𝐭𝐢𝐜𝐬 : tinyurl.com/3asa62c8
🔸🔹🔸🔹🔸🔹🔸🔹🔸🔹🔸🔹🔸🔹🔸🔹🔸🔹🔸🔹🔸🔹🔸🔹🔸🔹🔸🔹
---------------------------------------------------------------------------------
Blowfish Algorithm : • BLOWFISH ALGORITHM in ...
Elliptical Curve Cryptography - 1 : • Elliptic Curve Cryptog...
Brute force Attack : • Brute force attack in ...
Avalanche Effect in Cryptography : • Avalanche Effect in Cr...
Double & Triple DES : • Double DES and Triple...
Steganography / Cryptography Differences: • Steganography and Cryp...
Four Square Cipher : • Four Square Cipher - S...
Route Cipher : • Route Cipher - Transpo...
Fiestel Cipher Structure: • Feistel Cipher Structu...
Network Security - Attacks : • Network Security - Att...
Network Security - Authentication using Message Encryption : • Network Security - Au...
Fiestel Cipher Structure: • Feistel Cipher Structu...
Diffie Hellman Key Exchange: • Network Security - Dif...
Euler's Totient Function [Euler's Phi Function]: • Euler's Totient Functi...
Fermat's Theorem - Explanation with example: • Fermat's Theorem - Exp...
s DES - Key Generation : • S-DES Encryption || Si...
Differences between s-DES and DES: • Differences between s-...
Primitive Root : • Primitive Root - Crypt...
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[@lecturesbyshreedarshank8977]

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[@madhurjyadeka5569]

A very concise and standard explanation.
Thank you

[@asdfghjklzxc2222]

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

[@swarnas2313]

Nice explanation sir. Thank you very much !!

[@smashinu2]

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

[@lecturesbyshreedarshank8977]

Am really glad it helped u.. Thanks :)

[@_prof.paradox_]

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

[@lecturesbyshreedarshank8977]

Thanks...

[@bhavikjinjala980]

nice explanation

[@eichikionizuka6773]

T CHO MEC ! Merci

[@user-lt8eg8eb4q]

От души, мужик

[@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

[@samayakmalhotra3040]

Lovely Explanation

[@lecturesbyshreedarshank8977]

Thanks..Do share and subscribe

[@koushiksarma2613]

Thanks a lot sir !

[@robertnyirenda64]

Thank you so much you really helped

[@lecturesbyshreedarshank8977]

Glad to know..:)

[@omaewamushinderu]

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

[@lecturesbyshreedarshank8977]

Thanks 😊

[@programmers8245]

You are the best thanks alot

[@lecturesbyshreedarshank8977]

Thanks 😊

[@saurabhpatil2529]

Thank You sir

[@jitenkhatri8001]

Thank you so much sir

[@manmohan_pundir_shorts]

Great🤗

[@lecturesbyshreedarshank8977]

Thanks.. Do like and subscribe..

[@sripriyasrinivasan3796]

Great explaination! Thanks!!

[@lecturesbyshreedarshank8977]

Thanks

[@nitish7764]

Thank you 💕

[@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.. czcams.com/video/HDg9qxCfj3c/video.html

[@saharshithasa]

🔥🔥🔥🔥

[@geshbenrewand1778]

God bless you

[@lecturesbyshreedarshank8977]

Do like and subscribe

[@geshbenrewand1778]

Yup

[@vishalparmar988]

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

[@lecturesbyshreedarshank8977]

Thanks..
Do share and subscribe..

[@brucemclaren-]

This video just saved my ass negl

[@lakshitpardeshi4382]

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

[@lecturesbyshreedarshank8977]

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[@rishabhsharma8499]

do we skip swap in fk2?

[@hafsafarooqi9022]

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

[@anuhyasanaka739]

yes

[@darrirro]

I wish my teacher taught like this

[@lecturesbyshreedarshank8977]

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

[@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

[@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...

[@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.. czcams.com/video/HDg9qxCfj3c/video.html

[@sumanpatil88]

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

[@lecturesbyshreedarshank8977]

Usually it will be given in the question..

[@mihirkumar3805]

Hey! You forgot to swap on case of round two

[@lecturesbyshreedarshank8977]

There is no swapping after round 2...

[@v.deepthisree4844]

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

[@lecturesbyshreedarshank8977]

Yes, it's fixed

[@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...

[@kavanamgowda879]

Can I get the algorithm of this sir , please

[@lecturesbyshreedarshank8977]

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

[@saqlainramzan6640]

will IP given in question ?

[@lecturesbyshreedarshank8977]

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

[@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 : czcams.com/video/HDg9qxCfj3c/video.html

[@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...

[@ravikiranmutta1124]

how r value taken

[@lecturesbyshreedarshank8977]

Which values?

[@ravikiranmutta1124]

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

[@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

[@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.

[@nan6962]

did not cover decryption?

[@lecturesbyshreedarshank8977]

s DES Decryption : czcams.com/video/HDg9qxCfj3c/video.html

[@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...