krio

require 'crypt/rijndael'

#Set a pass-phrase that only you and receiver know
super_secret_key = Crypt::Rijndael.new("Don't tell anyone this key")

#Encrypt a string using the secret key
encrypted_string = super_secret_key.encrypt_string("this is the string that we need to hide!!")

#Decrypt the string using the same secret key
decrypted_string = super_secret_key.decrypt_string(encrypted_string)

krio

require 'net/http'
require 'uri'

postData = Net::HTTP.post_form(URI.parse('http://thewebsite.net'), 
                               {'postKey'=>'postValue'})

puts postData.body