Feistel Encoding (Cipher) made easy + step by step example ✅️

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Күн бұрын

#feistel #encoding
By the end of this video you will learn how to do Feistel Encoding (Encryption, Cipher). Do not get discouraged, if needed watch the video a few times and I promise you will understand how it works.
If you have not watched the Feistel Decoding (decryption) video you can do so here:
• Feistel DECODING (Ciph...
Here are the steps for Feistel encoding
step1: Divide the plaintext into two parts, L0 and R0 (L - left, R - right)
step2: R0 is encoded using fs(R0) and the result is stored into E
step3: L1 = R0 and R1 = L0 xor E
step4: concatenate L1 and R1 to obtain the result
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Пікірлер: 39

@projectcodemastery9243 3 жыл бұрын

Hi everyone! 👋 You're now covered for both encoding and decoding : Feistel Encoding (encryption): kzfaq.info/get/bejne/nMuerbx1l7Cdpqc.html Feistel Decoding (decryption): kzfaq.info/get/bejne/qc51pZtyyK_Vpn0.html I hope it helps, happy learning!

@fatemaabdulrahman3290 2 жыл бұрын

This video will make me pass my midterm tomorrow, thank you!!

@projectcodemastery9243 2 жыл бұрын

Good luck Fatema!!

@jouba2799 Жыл бұрын

You saved my life

@raviiyer48 3 жыл бұрын

Very well explained - really lucid. Thank you.

@notion8812 3 жыл бұрын

Ty u for UR ALGORITHM! I had not know before this video where I could find the F func.

@projectcodemastery9243 4 жыл бұрын

Boom! Feistel Encoding (feistel coding, encryption) explained step by step for beginners! I hope it helps!

@projectcodemastery9243 3 жыл бұрын

@Jojo Jojo 👋 Done, you can watch it here: kzfaq.info/get/bejne/qc51pZtyyK_Vpn0.html

@AMIRA-nw8jd 2 жыл бұрын

Yes it helps too much thank you

@MalekAlthubiany 2 жыл бұрын

well explained, Thank you for your efforts!

@mkrugl 3 жыл бұрын

TY for your explaning!!! I did not know where I would take F function...

@lindsayryder6919 3 жыл бұрын

Bless you!

@andersonfabianoraimundo6541 Жыл бұрын

Muito Obrigado, excelente aula.

@kamalraj2948 11 ай бұрын

you are grate mam !! it really usefull

@constanzaraquelsepulvedair2838 3 жыл бұрын

thanks you so so much

@NG-ee5qm Жыл бұрын

God bless you🙏

@emranulislam9102 2 жыл бұрын

Thank you

@mansisakariya2193 Жыл бұрын

well explained

@srg9413 Жыл бұрын

Well done, very nice explaination.

@projectcodemastery9243 Жыл бұрын

thank you, I hope you found it helpful!

@adnanmusa3675 3 ай бұрын

Thanks 👍

@projectcodemastery9243 3 ай бұрын

Welcome 👍

@othniel209 3 жыл бұрын

Looks like you didn't use any Round Key in this instance

@obinnaeke9663 7 ай бұрын

What if I want to calculate this with an underlying cipher being a Bitwise OR with say 1101?

@shaikhhuzaifa1687 3 жыл бұрын

please make a video for decrypted bits to encrypted bits I mean reverse of this

@projectcodemastery9243 3 жыл бұрын

Hello, I've just posted the video about Feistel decryption / decoding kzfaq.info/get/bejne/qc51pZtyyK_Vpn0.html

@shaikhhuzaifa1687 3 жыл бұрын

@@projectcodemastery9243 thanks alot

@charbilysf7592 Жыл бұрын

What if we have multiple rounds!

@vijay.itachi 2 жыл бұрын

what about Master Key and sub Keys?

@dominikagadomska3460 Жыл бұрын

All would be great if you had explained this using example of main key (9 bits) and how to generate round keys (8 bits) based on it. This is not given by lecturer :)

@projectcodemastery9243 Жыл бұрын

if the lecturer has not provided an explicit function, then they'll give you a rule (algorithm) by which you can create one yourself. As long as you stick to the rule your lecturer is giving you should be fine.

@paolamerino4792 9 ай бұрын

And, if I have a plaintext of an unpair number (7) I must add an ‘extra’ letter (for example: x) and do the process dividing my plain text in blocks of 2 letters

@projectcodemastery9243 9 ай бұрын

Hello, Someone else asked the same question so I will repost my answer below: "you just divide by 2 and work with each side like shown in the video. If the number of bits is odd, you just fill up the missing bit/bits at the end with zeros. So for example if we have the plaintext 10101010101 (length is 11), the divided would be 101010 101010" I hope this helps!

@shaileshthombe172 2 жыл бұрын

how to conver 40 to 12 digit plaintext

@projectcodemastery9243 2 жыл бұрын

Hi Shailesh, you just divide by 2 and work with each side like shown in the video. If the number of bits is odd, you just fill up the missing bit/bits at the end with zeros. So for example if we have the plaintext 10101010101 (length is 11), the divided would be 101010 101010 I hope this helps!

@paolamerino4792 9 ай бұрын

If I have a long plaintext (18 words) I must repeat the process 9 times?

@projectcodemastery9243 8 ай бұрын

no, you just split it in half