Computer Science

# Vigenère Cipher

A certain message is encoded with a 2 letter key. The encrypted message is

 1 BWGWBHQSJBBKNF 

We also happen to know that the second character of the plain-text is "I". Break the cipher and find the answer.

The following message is encrypted(via the Vingenre cipher) with the key DAMNDANIEL

 1 WHQNQSJMVERTTVVPEWFWHMUFIIIMLFQDDRGFBZXJIOGEWRVTPTRNRVYEUCROUEPSLFGGWTABUYOIBVWTAHGAGRRLWPYEZGBSRDIYPIXYLOAMMRKTTHQDEMHPLGTGBNVVIEKOGFDNQVMYHHGAGRRL 

Decipher the message to obtain the answer.

The string

 1 PETERPIPERPICKEDAPECKOFPICKLEDPEPPERS 

is encrypted with a key of unknown length. The resulting cipher text is

 1 RGVGTRKRGTRKEMGFCRGEMQHRKEMNGFRGRRGTU 

What is the length of the key?

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