class ActiveSupport::MessageEncryptor

def encrypt_and_sign(value, expires_at: nil, expires_in: nil, purpose: nil)

padding attacks. Reference: https://www.limited-entropy.com/padding-oracle-attacks/.
Encrypt and sign a message. We need to sign the message in order to avoid 
def encrypt_and_sign(value, expires_at: nil, expires_in: nil, purpose: nil)
  verifier.generate(_encrypt(value, expires_at: expires_at, expires_in: expires_in, purpose: purpose))
end