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buccolo/Vigenere.rb

Created December 10, 2011 21:00
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Vigenere Encryption
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Vigenere.rb
#!/usr/bin/ruby
class String; def ord; self[0]; end; end
phrase = "tobeornottobethatisthequestion"
keyword = "hamlet"
len = keyword.length
keyindex = 0
phrase.each_char do |c|
print ((c.ord - 97 + keyword[keyindex].ord - 97) % 26 + 97).chr
keyindex = (keyindex + 1) % len
end
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