require 'openssl'
require 'digest/sha1'

ENCRYPT_METHOD = "aes-256-cbc"
API_KEY = "YOUR_VWORKAPP_API_KEY"

# What you have to do
c = OpenSSL::Cipher::Cipher.new(ENCRYPT_METHOD)
c.encrypt
# your pass is what is used to encrypt/decrypt
c.key = Digest::SHA1.hexdigest(API_KEY)
e = c.update("USER_ID + JOB_ID")
e << c.final
puts "Encrypted text to send: #{e}\n"

# What we do
c = OpenSSL::Cipher::Cipher.new(ENCRYPT_METHOD)
c.decrypt
c.key = Digest::SHA1.hexdigest(API_KEY)
d = c.update(e)
d << c.final
puts "Decrypted result: #{d}\n"