Vigenere Cipher - Explained with an Example - Cryptography - Cyber Security - CSE4003

In this video lecture we will be looking at

1. What is Vigenere Cipher
2. Encryption and Decryption using Vigenere 26 X 26 table
3. Algebraic Expression for Vigenere Cipher

[isofedonix]

Very thoroughly explained, no time wasting, straight to the point

[relanjaynepales]

Nice teaching very effort it's specific discussion

[Spacemikee]

Time (14:50) the m2+k2 its 0+8=8 and it's the only one that you do not follow the equation 8-26=12 but for some reason you don't do that and it is staying as 8. Please tell me why it is staying like this. I don't get it

[samueloyinlola]

i have a question sir, the plaintext is 15 alphabets and the key is 16alphabets and the table was given what can do to the plaintext, how do i attempt the question, can anyone help?

[saisri]

missing that nice starting theme music (from java series) here 😃😃

[danp]

Upper Case Ascii starts with 65 to 90
Lower Case Ascii Starts with 97 to 122
use the parenthesis to get the correct outcome
Encrypt Upper Case String with Ascii Code C = (M + K) mod 26 + 65
Decrypt Upper Case String with Ascii Code M = (C - K) + 26) mod 26 + 65
Encrypt Lower Case String with Ascii Code step 1 C = ((M + K) mod 97) step 2 C = mod 26 + 97
Decrypt Lower Case String with Ascii Code M = (C - K) + 26) mod 97

[meerabbasharat]

Sir this is not that thing that our sir taught us 😭🥺. I forgot it 😭😭