Which of the following poses challenges in the breaking of the Vigenere Cipher?
Answers
For centuries from its discovery "Vigenère Cipher" was famous for being a secure cipher and for very long time it was believed to be unbreakable.
This thought that earned the nickname "le chiffre indéchiffrable".
Though this is not true it is very secure cipher in terms of paper and pen techniques and is used as a field cipher.
"Vigenère Cipher" is an adaptation of Trithemius Cipher but instead of systematic moving through the ciphertext alphabets in Tabula Recta it uses keyword to take columns for using.
One of the fundamental issues with basic substitution figures is that they are so helpless against recurrence examination.
Given an adequately vast ciphertext, it can without much of a stretch be broken by mapping the recurrence of its letters to the know frequencies of, state, English content.
Thusly, to make figures progressively secure, cryptographers have for quite some time been keen on creating enciphering systems that are invulnerable to recurrence investigation.