Playfair Cipher (Part 1)

Network Security: Playfair Cipher (Part 1)
Topics discussed:
1) Classical encryption techniques or Classical cryptosystems.
2) Basics of Playfair cipher and a general comparison of the cipher text with Caesar, Shift, and Monoalphabetic ciphers.
3) Important rules for encryption using Playfair ciphering technique.
4) Use of keyword and construction of 5x5 matrix using the keyword for the encryption process.
5) Creation of digrams and removal of repeating letters in digrams using filler letters.
6) Explanation of cryptanalysis on Monoalphabetic ciphers with example.

Music:
Axol x Alex Skrindo - You [NCS Release]

#NetworkSecurityByNeso #Cryptography #NetworkSecurity #PlayfairCipher

[qaisarkhan]

You are doing a great job and teaching far better than institutional teachers the graphics keeps us in touch with the lecture seems like a board interactive lecture thank u for this God Bless u keep up brother

[jimratter]

Thank you for this clear and detailed explanation of playfair cipher. I read about it in a book, "covert radio agents 1939-1945", but could not fully understand it.

[prachi]

Very nice lecture👏👏... Only useful content no unuse talks. Appreciate's you😊😊

[friendsinn]

Many thanks for this. It clearly explains the concepts

[OsamaAmer-hvvc]

Thank you for helping me understand because it helped me a lot in studying

Thank you again

[BobF]

This content is out of this world. A related book I read was life-affirming. "Game Theory and the Pursuit of Algorithmic Fairness" by Jack Frostwell

[emad]

what if i and j are both used in the encryption key?

[Luna-vkxy]

if I were a part of the keyword. then can we couple any unused letters together or it has to be j and some other letter?

[xhmfvnq]

I want to communicate with you that your explanation is the best

[__joshplays.]

Very helpful and understandable thanks ❤️

[sapnashah]

please please sir can you explain how conventational algorithm works

[pmarimuktu]

if keyword has repeating char. the ? can we include repeating char in the table or not?

[sreenivasuluKN-tndq]

Hello Sir, How to split into digrams
if Plain text is balloon

[mos-ees]

If x is an extra character then what can we do
Xe ro x ???

[uff_rani]

Thank you so much I want to learn c++ please suggest

[MohdAsim-vhek]

I think I/J signifies the Pigeonhole Principle.

[shantoshpersonal]

if our plaintext is max, then what is the digram? is it ma xx

[bharathdynamo]

Why only i and j are combined, why not other??

[manojkoncha]

what if the last letter in plain text is x alone

[jyotsnavangepuram]

Why I/j only in one shell why not other alphabets