encryption.rb

encryption.rb

#create an encryption algorithm (steps to mask a word)
encryption = {"a"=>"c", "b"=>"d", "c"=>"e", "d"=>"f", "e"=>"g",
"f"=>"h", "g"=>"i", "h"=>"j", "i"=>"k", "j"=>"l",
"k"=>"m", "l"=>"n", "m"=>"o", "n"=>"p", "o"=>"q",
"p"=>"r", "q"=>"s", "r"=>"t", "s"=>"u", "t"=>"v",
"u"=>"w", "v"=>"x", "w"=>"y", "x"=>"z", "y"=>"a", "z"=>"b"}

decryption = encryption.invert

#ask the user for a word
puts "Please type a word."
users_word = gets.chomp

#break the word up into a collection of its letters and save it to an array
split_word = users_word.split("")

#create a new array called secret_word as a placeholder to store each encrypted letter
secret_word = []

#iterate through each letter in word
split_word.each do |letter|

#lookup the letter's encrypted value
encrypted_letter = encryption[letter]

#store the encrypted value in secret_word array
secret_word << encrypted_letter

#join the secret_word array into one word and print to screen

end

puts ""
puts "Your encrypted word is:"

encrypted_word = secret_word.join("")
puts "#{encrypted_word}"


# Decrypt the encrypted word and print the original word

decrypted_word = []

encrypted_word = encrypted_word.split("")

encrypted_word.each do |letter|
decrypted_letter = decryption[letter]

decrypted_word << decrypted_letter
end

puts ""
puts "Your decrypted word is:"
decrypted_word = decrypted_word.join("")
puts "#{decrypted_word}"