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

[@projectcodemastery9243]

Hi everyone! 👋 You're now covered for both encoding and decoding : Feistel Encoding (encryption): kzbin.info/www/bejne/nJbRq4x6Z69srNU Feistel Decoding (decryption): kzbin.info/www/bejne/qZmoo2t3mK6krKs I hope it helps, happy learning!

[@fatemaabdulrahman3290]

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

[@projectcodemastery9243]

Good luck Fatema!!

[@jouba2799]

You saved my life

[@raviiyer48]

Very well explained - really lucid. Thank you.

[@notion8812]

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

[@projectcodemastery9243]

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

[@projectcodemastery9243]

@Jojo Jojo 👋 Done, you can watch it here: kzbin.info/www/bejne/qZmoo2t3mK6krKs

[@AMIRA-nw8jd]

Yes it helps too much thank you

[@mkrugl]

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

[@NG-ee5qm]

God bless you🙏

[@srg9413]

Well done, very nice explaination.

[@projectcodemastery9243]

thank you, I hope you found it helpful!

[@lindsayryder6919]

Bless you!

[@kamalraj2948]

you are grate mam !! it really usefull

[@MalekAlthubiany]

well explained, Thank you for your efforts!

[@adnanmusa3675]

Thanks 👍

[@projectcodemastery9243]

Welcome 👍

[@mansisakariya2193]

well explained

[@emranulislam9102]

Thank you

[@othniel209]

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

[@andersonfabianoraimundo6541]

Muito Obrigado, excelente aula.

[@obinnaeke9663]

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

[@constanzaraquelsepulvedair2838]

thanks you so so much

[@charbilysf7592]

What if we have multiple rounds!

[@rabiumuideen2470]

Pls how to convert plaintext given in alphabetical to binary bits

[@dominikagadomska3460]

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]

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.

[@vijay.itachi]

what about Master Key and sub Keys?

[@shaikhhuzaifa1687]

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

[@projectcodemastery9243]

Hello, I've just posted the video about Feistel decryption / decoding kzbin.info/www/bejne/qZmoo2t3mK6krKs

[@shaikhhuzaifa1687]

@@projectcodemastery9243 thanks alot

[@paolamerino4792]

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

[@projectcodemastery9243]

no, you just split it in half

[@paolamerino4792]

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]

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]

how to conver 40 to 12 digit plaintext

[@projectcodemastery9243]

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!

[@storewidepaul]

i am lost

[@projectcodemastery9243]

hey! where are you stuck? Please try watching it again, it will make sense eventually. All the best!