class Key
attr_reader :key

def nextByte
@base = (@base + 1) % 3
@key[@base]
end

def initialize(key)
@base = -1
@key = key
end
end

ctextfile = File.open(“cipher1.txt”)
ctext = ctextfile.gets.split(“,”).collect { |b| b.to_i.chr }.join

cleartext = Array.new keylist = Array.new
(‘a’..’z').each { |v1|
(‘a’..’z').each { |v2|
(‘a’..’z').each { |v3|
keylist.push Key.new(“#{v1}#{v2}#{v3}”)
}
}
}

keylist.each { |key|
t = “”
puts “Crypting for key: #{key.key}”
ctext.each_byte { |byte|
b = byte ^ key.nextByte
t